Includes all flowering plants, conifers, ferns and fern-allies.
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105 genera
367 species, 112 subspecies and varieties
Show only taxa with photos
Index to genera:
Abies,
Abronia,
Abutilon,
Acer,
Achillea,
Achlys,
Achnatherum,
Acmispon,
Aconitum,
Aconogonon,
Acorus,
Actaea,
Adelinia,
Adenocaulon,
Adiantum,
Adonis,
Aegilops,
Aegopodium,
Aesculus,
Agastache,
Ageratina,
Agoseris,
Agrimonia,
Agropogon,
Agropyron,
Agrostemma,
Agrostis,
Ailanthus,
Aira,
Ajuga,
Alcea,
Alhagi,
Aliciella,
Alisma,
Alliaria,
Allium,
Allotropa,
Alnus,
Alopecurus,
Alstroemeria,
Alyssum,
Amaranthus,
Amauropelta,
Ambrosia,
Amelanchier,
Ammannia,
Ammophila,
Amorpha,
Amphiscirpus,
Amsinckia,
Anaphalis,
Anchusa,
Andromeda,
Androsace,
Anemone,
Anethum,
Angelica,
Anisocarpus,
Antennaria,
Anthemis,
Anthoxanthum,
Anthriscus,
Anticlea,
Antirrhinum,
Apera,
Aphanes,
Aphyllon,
Apium,
Apocynum,
Aquilegia,
Arabidopsis,
Arabis,
Aralia,
Arbutus,
Arceuthobium,
Arcteranthis,
Arctium,
Arctostaphylos,
Arenaria,
Aristida,
Armeria,
Armoracia,
Arnica,
Aronia,
Arrhenatherum,
Artemisia,
Arum,
Aruncus,
Asarum,
Asclepias,
Askellia,
Asparagus,
Asperugo,
Aspidotis,
Asplenium,
Astragalus,
Athyrium,
Athysanus,
Atocion,
Atriplex,
Atropa,
Aubrieta,
Aucuba,
Avena,
Azolla
– Pacific silver fir
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to northern California.
Habitat: Mostly at 1000-4000 feet elevation in the mountains.
Origin: Native
Growth Duration: Perennial
– grand fir
Distribution: Occurring on both sides of the Cascades crest in Washington; Vancouver Island, British Columbia to California, east to Idaho and Montana.
Habitat: Coniferous forests, from sea level to mid-elevations in the mountains.
Origin: Native
Cones: May-June
Growth Duration: Perennial
–
alpine fir, subalpine fir
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Subalpine to alpine slopes, where commonly in krumholtz form.
Origin: Native
Cones: June-July
Growth Duration: Perennial
– Rocky Mountain subalpine fir
– subalpine fir
– noble fir
Distribution: Occurring chiefly west of the Cascades crest in Washington; northern Washington to the Siskiyou Mountains in northern California.
Habitat: Deep forests where there is sufficient moisture, moderate to fairly high elevations.
Origin: Native
Growth Duration: Perennial
– yellow sand verbena
Distribution: Occurring west of the Cascades crest in Washington along the coast; Vancouver Island, British Columbia to California.
Habitat: Coastal beaches and sand dunes.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
honey-scented sandverbena, white sand verbena
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington to southeastern Oregon, east to Montana and western Wyoming.
Habitat: Dunes and sandy soil at low elevations.
Origin: Native
Flowers: May-October
Growth Duration: Perennial
– honey-scented sandverbena, white sand verbena
–
pink sand verbena
Distribution: Occurring west of the Cascades crest along the outer coast in Washington; British Columbia to Baja California.
Habitat: Coastal sandy beaches and adjacent dunes.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
– sand verbena
– velvetleaf
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed open places.
Origin: Introduced from Eurasia
Flowers: July-August
Growth Duration: Annual
– field maple, hedge maple
Distribution: Occurring west of the Cascades crest in Washington; Washington to California, also in scattered locations in eastern North America.
Habitat: Fields, forest edges, and other disturbed areas where escaped from cultivation
Origin: Introduced from Eurasia
Flowers: April-May
– vine maple
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to northern California.
Habitat: Moist woods from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
–
Rocky Mountain maple
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Moist woods from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Douglas maple
– big-leaf maple
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to southern California.
Habitat: Moist woods from sea level to middle elevations in the mountains.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
– box elder, box elder maple
Distribution: Occurring chiefly east of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Occasionally escapes from cultivation, chiefly in disturbed areas or riparian zones.
Origin: Introduced from eastern North America, escaped from cultivation
Flowers: April-June
Growth Duration: Perennial
– Norway maple
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho and Montana; invasive in eastern North America.
Habitat: Forest edge, riparian zones, fields, and other disturbed areas where escaped from cultivation.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Perennial
– sycamore maple
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon, east to Montana, also in eastern North America.
Habitat: Forest edge, fields, and other disturbed areas where escaped from cultivation.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Perennial
– silver maple
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Montana, also in central and eastern North America where native.
Habitat: Riparian corridors, moist bottomlands, and other areas near water, often disturbed.
Origin: Introduced from central and eastern North America
Flowers: March-April
Growth Duration: Perennial
– milfoil, yarrow
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast; circumboreal
Habitat: Common in open, dry to somewhat moist areas from low to high elevations; tolerant of disturbance.
Origin: Both native and introduced populations
Flowers: February-October
Growth Duration: Perennial
– pearl yarrow
Distribution: Reported from Washington but no specimens seen; Alaska to Oregon, east in scattered locations across North America to the Atlantic Coast.
Habitat: Roadsides, wastelots, and other disturbed open areas where occasinally escaping from cultivation.
Origin: Introduced from Eurasia
Flowers: May-August
Growth Duration: Annual, Perennial
– California deer's-foot, California vanilla leaf
Distribution: Occurring on both sides of the Cascades and in the Olympic Mountains in Washington; British Columbia to California.
Habitat: Moist areas in deep woods to open parks.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
–
deer's-foot, vanilla leaf
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California.
Habitat: Moist areas in deep woods to forest openings.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– deerfoot, vanillaleaf
– Henderson's needlegrass
Distribution: Occurring east of the Cascades crest in Douglas, Kittitas, and Yakima counties; central Washington to Jefferson County, Oregon.
Habitat: Dry, rocky, shallow soil, in sagebrush desert or ponderosa pine forest openings.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– Indian ricegrass
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
Habitat: Grasslands, desert plains, and foothills, especially on rocky or sandy soil.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
–
Lemmon's needlegrass
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Grassy balds, prairies, sagebrush grasslands, and ponderosa pine forest, from the lowlands to middle elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
–
Nelson's needlegrass
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to California, east to the northern Great Plains and Colorado.
Habitat: Moist to mesic, montane to subalpine meadows and open forest.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Nelson's needlegrass
– Nelson's needlegrass
–
western needlegrass
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Grassland, sagebrush desert, and coniferous forests from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– California needlegrass
– western needlegrass
– Richardson's ricegrass
Distribution: Occurring east of the Cascades crest in Washington; Alaska to northeastern Oregon, east to the Canadian Great Plains and south in the Rocky Mountains to Colorado.
Habitat: Sandy and gravelly sites in grassland, open forest, and sagebrush grassland.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
– Thurber's ricegrass
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to California, east to Montana, Wyoming, and Colorado.
Habitat: Sagebrush grassland and ponderosa pine forest.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
–
American bird's-foot trefoil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Rocky Mountains, south to Mexico.
Habitat: Chiefly in sandy to rocky, exposed or wooded areas, more common at low elevations
Origin: Native
Flowers: April-September
Growth Duration: Annual
– American bird's-foot trefoil
– riverbar bird's-foot-trefoil
Distribution: Occurring on both sides of the Cascades in Washington; southern British Columbia to California, disjunct in southern Idaho and southwestern Utah.
Habitat: Sandy to rocky soil in open areas at low to moderate elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Nevada.
Habitat: Open, disturbed areas including road cuts, balds, grasslands, and forest edges at low to moderate elevations.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– small-flowered bird's-foot trefoil
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Open slopes and sandy flats, seashore into the mountains.
Origin: Native
Flowers: April-September
Growth Duration: Annual
–
Columbian monkshood
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist woods and meadows, moderate to subalpine elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Columbian monkshood
– Newberry's fleeceflower, Davis' knotweed, Davis's knotweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California.
Habitat: Slopes and ridges in the subalpine and alpine.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
–
alpine fleeceflower
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Idaho, Montana, and Nevada.
Habitat: Subalpine to alpine ridges, meadows and talus slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– poke knotweed
– sweet flag
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to California, east to Idaho, also widespread in central and eastern North America.
Habitat: Wetlands, pond shores, and streambanks.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
–
tall bugbane
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to Oregon.
Habitat: Moist, shady woods at low elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– tall bugbane
– cut-leaved bugbane, Mt. Hood bugbane
Distribution: Occurring west of the Cascades crest in southwestern Washington; southwestern Washington to adjacent northwestern Oregon.
Habitat: Moist woods at middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– baneberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist woods and streambanks from low elevations to middle elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– Adeline's hound's-tongue, Pacific hound's-tongue, grand hound
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California.
Habitat: Forest openings and meadows at low to moderate elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– pathfinder, trailplant
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east the northern Rocky Mountains, northern Great Plains, and Great Lakes region.
Habitat: Moist, shady woods at low to middle elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
–
maidenhair fern, northern maidenhair fern
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east sporadically to the Rocky Mountains, also in the Great Lakes region and northeastern North America.
Habitat: Moist woods and streambanks, from low to middle elevations in the mountains.
Origin: Native
Growth Duration: Perennial
– Aleutian maidenhair fern, western maidenhair fern
– summer pheasant's-eye
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Montana, Idaho, and Utah.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
– jointed goatgrass
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of the United States to the Atlantic Coast.
Habitat: Waste ground and roadsides; a troublesome weed in wheat.
Origin: Introduced from southern Europe
Flowers: May-July
Growth Duration: Annual
– bishop's goutweed
Distribution: Occurring in scattered locations west of the Cascades crest in the Puget Trough in Washington; southern British Columbia to Oregon, also in eastern North America.
Habitat: Disturbed forest understory and edge, where often dumped as garden waste.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
– horse-chestnut
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon, also in central and eastern North America.
Habitat: Disturbed forested areas, particularly in urban and suburban areas where the species is planted as a street tree.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
– western giant-hyssop
Distribution: Occurring east of the Cascades crest in Washington; central Washington to north-central and northeastern Oregon.
Habitat: Dry, open, often rocky slopes at low to moderate elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
nettle-leaf giant-hyssop
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Colorado.
Habitat: Dry open slopes and draws, foothills to middle elevations in the mountains
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– nettle-leaf giant-hyssop
– western boneset, western snakeroot
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Utah, and Nevada.
Habitat: Rocky places at various altitudes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
seaside agoseris
Distribution: Occurring west of the Cascades crest in Washington along the outer coast. Washington to California.
Habitat: Coastal dunes and beach heads.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– seaside agoseris
–
orange agoseris
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Great Plains, and Quebec.
Habitat: Meadows and forest openings at from middle elevations to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– orange agoseris, slender agoseris
– pink agoseris
– tall agoseris, tall goat-chicory
Distribution: Occurring on both sides of the Cascades crest in Washington; south-central British Columbia to California.
Habitat: Meadows and open woods, from the valleys to middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
–
pale agoseris, short-beaked agoseris
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, and Great Lakes region.
Habitat: Open forests and open areas, from low to high elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– pale agoseris, pale goat-chicory
–
large-flowered agoseris
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho and Nevada.
Habitat: Prairies, balds, meadows, and forest openings, often where seasonally dry, from low to middle elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– large flowered agoseris, large flower goat-chicory
– Puget Sound agoseris
–
annual agoseris
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Utah, and Arizona.
Habitat: Dry, open areas at low to mid-elevations.
Origin: Native
Flowers: April-July
Growth Duration: Annual
– mountain agoseris, Sierra Nevada agoseris
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Mesic meadows in the subalpine and alpine, often in soils of volcanic origin.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
– spear leaved agoseris, spear leaf goat-chicory
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada, Utah, and Arizona.
Habitat: Sagebrush desert, grassy slopes, and ponderosa pine forest openings at low to middle elevations.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– tall hairy agrimony, tall hairy grooveburr
Distribution: Reported from Washington but currently no specimens exist; British Columbia to California, east to the Rocky Mountains.
Habitat: Edges, openings, draws, thickets, and open forest.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– crested wheatgrass
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast.
Habitat: Dry, open areas where distiurbed; frequently planted for soil stabilization and forage.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
– Siberian wheatgrass
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to southeastern Idaho.
Habitat: Sagebrush desert, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual
–
common corncockle
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides and wasteland.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Annual
– common corncockle
– colonial bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Open, disturbed areas often at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
– Highland bentgrass, dryland browntop
Distribution: Occurring west of the Cascades crest in lowland western Washington: southwestern British Columbia to California.
Habitat: Disturbed sites, roadsides, and gravel bars.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
– California bentgrass
Distribution: Occurring west of the Cascades crest in western Washington along the outer coast; coastal Washington to California.
Habitat: Coastal bluffs.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– spiked bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Nebraska and Texas.
Habitat: Moist areas, from near sea level to mid-elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– black bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Disturbed sites, roadsides, edge of agricultural fields, mostly at low elevations.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial
– Idaho bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Subalpine and alpine meadows, along wet seepage areas, bogs, and wet openings in coniferous forests.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Merten's bentgrass, northern bentgrass
Distribution: Occurring in the Cascades Range in Washington; Alaska to northern Washington; circumboreal.
Habitat: Rocky alpine meadows and ridgelines.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
– small-leaf bentgrass
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southwestern British Columbia to California.
Habitat: Seasonally wet areas on thin, rocky or sandy substrates, vernal pools, cliffs, and serpentine areas.
Origin: Native
Flowers: May-June
Growth Duration: Annual
– Oregon bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Wyoming, and Nevada.
Habitat: Stream and lake margins, damp woodlands and meadows.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
– seashore bentgrass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to western Montana and Utah.
Habitat: Coastal sands and cliffs, meadows, open, dry lowlands to subalpine forest.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– rough bentgrass
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Disturbed sites in grassl, open forest, marshes, and lakesides, often
along roads and ditches.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– spreading bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Wet, disturbed areas that include streambanks, flooded fields, and ditches at low to moderate elevations.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial
– alpine bentgrass
Distribution: Occurring on both sides of the Cascades crest in Washington British Columbia to California, east to the Rocky Mountains.
Habitat: Wet subalpine and alpine seeps and meadows.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– tree-of-heaven
Distribution: Occurring chiefly east of the Cascades crest in Washington, British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Escaped ornamental in roadsides, waste areas, along railroad tracks, and other open, disturbed areas.
Origin: Introduced from China
Flowers: May-July
Growth Duration: Perennial
–
silver hairgrass
Distribution: Occurring west of the Cascades crest in Washington and east in the Columbia River Gorge; British Columbia to California, east to Idaho and Wyoming, also in the southeastern U.S. and northeastern North America.
Habitat: Balds, prairies, meadows, forest openings, roadsides, wastelots, and other open areas at low to middle elevations.
Origin: Introduced Eurasia and North Africa
Flowers: May-August
Growth Duration: Annual
– silver hairgrass
– early silver hairgrass
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California; also in eastern North America.
Habitat: Gravelly prairies, sea bluffs and dunes near the coast, also in other disturbed, open areas at low elevations.
Origin: Introduced from Europe
Flowers: April-September
Growth Duration: Annual
– carpet bugle
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon, east in scattered locations in Idaho and Montana; widespread in central and eastern North America.
Habitat: Disturbed ground, often in forest understory.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
– camelthorn
Distribution: Occurring east of the Cascades crest in Washington; Washington, Idaho, and California east to Colorado and Texas.
Habitat: Disturbed areas in arid lands at low to moderate elevations.
Origin: Introduced from Asia
Flowers: June-August
Growth Duration: Perennial
– Great Basin gilia, sand gily-flower
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Open, sandy and rocky areas in sagebrush steppe from low to middle elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
– Lott's gily-flower
Distribution: Occurring east of the Cascades crest in the south-central portion of Washington; Washington south to California, east to Idaho and Utah.
Habitat: Open, sandy areas in sagebrush-steppe at low to middle elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
– grass-leaved water-plantain, narrow-leaf water-plantain
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Minnesota and Wisconsin.
Habitat: Marshy areas, often in standing water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– European water plantain
Distribution: Currently only known from King County in Washington; Alaska, where native, to British Columbia, where also introduced.
Habitat: Marshy areas, sometimes largely submerged.
Origin: Introduced from Eurasia and Alaska
Flowers: June-September
Growth Duration: Perennial
– northern water plantain
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast.
Habitat: Streams, lakes, ponds, wet ditches, wetlands, and cattle ponds.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– garlic mustard
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to Oregon, also in Utah, widespread from central Great Plains to eastern North America.
Habitat: Disturbed forest understory, often where moist, at low elevations.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Annual, Biennial
– taper-tip onion
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to Wyoming.
Habitat: Balds, grasslands, rocky outcroppings, dry slopes, and other open areas from low to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– narrow-leaf onion
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California.
Habitat: Dry slopes and open meadows at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– rosy Sierra onion
Distribution: Occurring east of the Cascades crest where known from Yakima County in Washington; Washington to California, east to Nevada.
Habitat: Dry soils at medium to high elevations.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
– nodding onion
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to the Rocky Mountains; also in central and southeastern U.S.
Habitat: Open, somewhat moist areas, sea level to high elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Columbia onion
Distribution: Occurring east of the Cascades crest in far eastern Washington; Washington to Idaho and Montana.
Habitat: Seasonally wet soils on rock outcrops, wet meadows.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Grand Coulee onion
Distribution: Occurring east of the Cascades crest in Grant and Douglas counties in Washington.
Habitat: Shallow, vernally-moist soils in low, open areas.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– scalloped onion
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Forest openings and mountain meadows, moderate to high elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Blue Mountain onion
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Columbia County.
Habitat: Open, fairly dry, rocky areas at low to middle elevations.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
– Douglas' onion
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to eastern Oregon.
Habitat: Open, vernally-moist areas at low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Cuddy Mountain onion, fringed onion
Distribution: Occurring chiefly in the southeastern counties of Washington; Washington east to Montana, south to Oregon.
Habitat: Moist, shallow soils in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
–
Geyer's onion
Distribution: Occurring east of the Cascades crest in Washington; southern Vancouver Island to Arizona, east to the Rocky Mountains and northern Great Plains.
Habitat: Low meadows and along streams.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– Geyer's onion
– bulbil onion, Rydberg's onion
– rock onion
Distribution: Occurring east of the Cascades crest in Washington; central Washington to southern Oregon and southwestern Idaho.
Habitat: Lithosol and barren, gravelly soils in the shrub-steppe.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– Nevius's garlic, Nevius's onion
Distribution: Occurring east of the Cascades crest in central Washington; Chelan County, Washington to Wasco County, Oregon
Habitat: Vernally wet meadows and rocky soils at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Robinson's onion
Distribution: Near the Columbia River in Washington; Washington south to north-central Oregon.
Habitat: Sand and gravel near the river to rocky, even lithosol benches.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– garlic
Origin: Introduced from Old World, exact origin unknown
– chives
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon and Nevada, east to the Rocky Mountains, further east across Canada to the Great Lakes region and eastern North America.
Habitat: Wet meadows, rocky or gravelly streambanks and lake shores
Origin: Both native and introduced populations
Flowers: April - August
Growth Duration: Perennial
– fragile onion, scilla-like onion
Distribution: Occurring east of the Cascades crest, where endemic in Washington from Douglas to Klickitat counties.
Habitat: Scablands and dry, barren, gravelly soils.
Origin: Native
Flowers: March-April
Growth Duration: Perennial
–
Tolmie's onion
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to adjacent western to Idaho, south to northeastern California.
Habitat: Rocky, gravelly or clayey soils, generally with sparse cover.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– Tolmie's onion
– Pacific onion, swamp onion
Distribution: Occurring at Mount Rainier in Washington, where disjunct; Washington to California, east to Idaho and northern Nevada.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– wild chives, crow garlic, wild garlic
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
– candystick, sugarstick
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho, and Nevada.
Habitat: Deep humus of coniferous forests at low to middle elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
green alder, mountain alder
Distribution: Widely distributed throughout the mountainous areas on both sides of the Cascades crest in Washington; Alaska to northern California, east to Alberta and the northern Rocky Mountain States.
Habitat: Moist areas, low to high elevations
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– mountain alder
– Black alder, European alder
Distribution: Occurring west of the Cascades crest in King County, where escaping from a wetland restoration planting. Great Lakes region east to the Atlantic Coast.
Habitat: Wetlands at low elevation.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
–
mountain alder
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, and eastern North America,
Habitat: Moist places, streamsides, and avalanche chutes from low to middle elevations.
Origin: Native
Flowers: March-May
Growth Duration: Perennial
– mountain alder
– white alder
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California and Nevada, east to Idaho.
Habitat: Near streams at low elevations.
Origin: Native
Flowers: January-April
Growth Duration: Perennial
– red alder
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct to the east in northern Idaho.
Habitat: Moist areas at low elevations.
Origin: Native
Flowers: March-April
Growth Duration: Perennial
–
little foxtail, short-awn foxtail
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Shores, riverbanks, vernal pools, sloughs, wet meadows, and seeps, often submersed.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– little foxtail, short-awn foxtail
– creeping meadow-foxtail
Distribution: Occurring east of the Cascades crest in Washington; central British Columbia to Washington, east to the Rocky Mountains and northern Great Plains; also in scattered locations in eastern North America.
Habitat: Alkaline meadows and shores, ditches, shores.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
– tufted meadow-foxtail
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Atlantic Coast.
Habitat: Shores, wet meadows, vernal pools, ditches.
Origin: Introduced from central North America?
Flowers: May-July
Growth Duration: Annual
– water foxtail
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast in Canada.
Habitat: Wet places, often in standing water.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– slender meadow-foxtail
Distribution: Occurring chiefly east of the Cascades crest in Washington; southwestern British Columbia to California, also in the southern and eastern U.S. and Canadian Great Plains.
Habitat: Margins of cultivated fields, damp roadsides, and vernal pools.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Annual
– field meadow-foxtail
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Swampy areas in meadows, in irrigated fields, and along roadsides.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Perennial
– Pacific meadow-foxtail
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; Washington and southwestern Oregon to California.
Habitat: Lowland vernal pools, shores, wet scabland, meadows.
Origin: Native
Flowers: May-June
Growth Duration: Annual
– small alyssum, pale madwort
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Meadows, forest openings, sagebrush flats, roadsides, fields, and disturbed open areas at low to middle elevations.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual, Biennial
– desert alyssum
Distribution: East of the Cascades in Washington; widely distributed throughout central and western North America.
Habitat: Dry, open ground, often where disturbed.
Origin: Introduced from Eurasia
Flowers: May-June
Growth Duration: Annual
– white pigweed, tumbleweed
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Dry, disturbed areas.
Origin: Introduced from tropical America
Flowers: June-September
Growth Duration: Annual
– matweed, prostrate pigweed
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast; cosmopolitan.
Habitat: Dry, disturbed areas
Origin: Introduced from central United States
Flowers: June - September
Growth Duration: Annual
– livid amaranth, pale amaranth
Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California; also in the southeastern U.S. and eastern North America.
Habitat: Fields, roadsides, wastelots and other disturbed areas.
Origin: Introduced from the tropics
Flowers: May-July
Growth Duration: Annual
– California amaranth
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington to California, east to the Rocky Mountains and Great Plains.
Habitat: Moist, often alkaline flats, lakeshores, and vernal pools.
Origin: Native
Flowers: July-October
Growth Duration: Annual
– Argentina amaranth
Distribution: Occurring east of the Cascades crest in Washingotn, where known only from Whitman County; Washington to California; also in eastern North America.
Habitat: Open, disturbed areas.
Origin: Introduced from South America
Flowers: July-September
Growth Duration: Annual
– green amaranth, hybrid amaranth, smooth amaranth, green pigweed, smooth pigweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from eastern North America
Flowers: July-October
Growth Duration: Annual
– green amaranth, Powell's amaranth
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from the southwestern United States and Mexico
Flowers: July-October
Growth Duration: Annual
– redroot pigweed, rough pigweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from eastern and central North America
Flowers: July-October
Growth Duration: Annual
– Nevada marsh fern, Sierra marsh fern, Sierra wood fern
Distribution: Occurring in the Cascades in Washington; Alaska to central Cascades in Washington; also in eastern Asia.
Habitat: Stream banks, moist forest, and springs, lowland to midmontane.
Origin: Native
Growth Duration: Perennial
– flat spine bur-ragweed, annual bursage, bur ragweed
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Great Plains.
Habitat: Sandy soils, dunes, and other well-drained soils in open areas at low to middle elevations, often locally common.
Origin: Native
Flowers: July-October
Growth Duration: Annual
– annual ragweed, common ragweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, pastures, wastelots, and other dry, disturbed, open areas at low elevations.
Origin: Introduced from eastern North America
Flowers: August-October
Growth Duration: Annual
– silver beachweed, beach bur, cutleaf beach bur, silver bur-ragweed
Distribution: Occurring west of the Cascades crest along the marine coastline beaches in Washington; British Columbia, south along the coast, to California.
Habitat: Common on sandy beaches above high tide level.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– perennial ragweed, western ragweed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Native
Flowers: July-October
Growth Duration: Perennial
– giant ragweed
Distribution: Occurring chiefly east of the Cascades crest; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed sites, often where moist.
Origin: Native
Flowers: July-October
Growth Duration: Annual
– saskatoon, serviceberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– Utah serviceberry
Distribution: Occurring east of the Cascades crest in Washington; Washington to Baja California, east to the Rocky Mountains and Texas.
Habitat: Rimrock, valleys, gullies and hillsides, from sagebrush desert to mid-elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– valley redstem
Distribution: Occurring west of the Cascades crest in Washington, where known only in King County for a restoration site; California east along Mexican border to central and eastern U.S.
Habitat: Restored wetland.
Origin: Introduced from the southern U.S.
Flowers: June-August
Growth Duration: Perennial
– western ammania, grand redstem
Distribution: Occurring east of the Cascades crest in Washington chiefly along the Columbia River; British Columbia to California, east to the Great Lakes region and midwestern U.S.
Habitat: Wet places, often where alkaline.
Origin: Native
Flowers: May-June
Growth Duration: Annual
–
European beachgrass
Distribution: Occurring west of the Cascades crest in Washington along the marine coast; western British Columbia to California, also in scattered locations along coast of northeastern North America.
Habitat: Sandy beaches and dunes along the coast.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
– European beachgrass
–
American beachgrass
Distribution: Occurring west of the Cascades crest in Washington along the marine coast; western British Columbia to California; native from Great Lakes region east to the Atlantic Coast.
Habitat: Sandy beaches and dunes along the coast.
Origin: Introduced eastern North America
Flowers: June-August
Growth Duration: Perennial
– American beachgrass
– false indigo-bush
Distribution: Occurring chiefly east of the Cascades crest and along the Columbia River in Washington; Washington to California, east across much of North America, including eastern Canada.
Habitat: Disturbed areas, roadsides, wastelots, and often along streams, rivers and other riparian corridors.
Origin: Introduced from eastern North America, where native
Flowers: May-July
Growth Duration: Perennial
– Nevada bulrush
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains (but not in Idaho) and northern Great Plains.
Habitat: Alkaline shores, limy fens, and wet meadows; rarely on dredge spoils.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– fireweed fiddleneck, rancher's fiddleneck
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Baja California, Mexico, east to Idaho, Utah, Arizona, and west Texas.
Habitat: Balds, meadows, prairies, roadsides, and other open areas at low to middle elevations.
Origin: Native
Flowers: April-May
Growth Duration: Annual
– bugloss fiddleneck, tarweed fiddleneck
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains, also in eastern North America.
Habitat: Roadsides, fields, meadows, grassy slopes, ponderosa pine forest openings, and other open areas from sagebrush desert into the mountains, often associated with some type of disturbance .
Origin: Native
Flowers: April-July
Growth Duration: Annual
– harvest fiddleneck, rigid fiddleneck, rancher's fireweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California.
Habitat: Open, dry foothills.
Origin: Native
Flowers: April-July
Growth Duration: Annual
– harvest fiddleneck, rigid fiddleneck
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Utah.
Habitat: Relatively dry and open areas at low to moderate elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
–
seaside amsinckia, seaside fiddleneck
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California.
Habitat: Coastal dunes or sandy bluffs.
Origin: Native
Flowers: May-July
Growth Duration: Annual
– seaside amsinckia, seaside fiddleneck
–
bristly amsinckia, bristly fiddleneck, tessellate fiddleneck
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, south to New Mexico.
Habitat: Roadsides and dry, open slopes and flats, often in disturbed soil.
Origin: Native
Flowers: April-June
Growth Duration: Annual
– bristly amsinckia, bristly fiddleneck, tessellate fiddleneck
– pearly everlasting
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast except for extreme southeastern U.S.
Habitat: Dry to somewhat moist open areas, from low elevations to the subalpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
–
Italian alkanet, Italian bugloss
Distribution: Occurring in scattered localities on both sides of the Cascades crest in Washington; British Columbia to California, scattered localities east to the Atlantic Coast.
Habitat: Disturbed soil.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
– Italian alkanet, Italian bugloss
– common alkanet, common bugloss
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Rocky Mountains and northern Great Plains, also from the Great Lakes region to northeastern North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low elevations.
Origin: Introduced from Mediterranean region
Flowers: May-July
Growth Duration: Biennial, Perennial
–
bog rosemary
Distribution: Reported to occur in northern Washington but no specimens seen; Alaska to Idaho, east across Canada, in the Great Lakes region, and in the northeastern U.S.
Habitat: Sphagnum bogs and other acidic wetlands.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– bog rosemary
– slender-stem rock-jasmine
Distribution: Occurring in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon, east to Idaho, Montana, Utah and Colorado; also in northern California.
Habitat: Damp to wet meadows, shores, riparian flats and thickets.
Origin: Native
Flowers: June-July
Growth Duration: Annual
– smooth douglasia, cliff dwarf-primrose
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Ledges, rocky slopes, moist talus, and ridges, lowland to alpine.
Origin: Native
Flowers: March-August
Growth Duration: Perennial
– snow douglasia
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Okanogan, Chelan, Kittitas, and Douglas counties.
Habitat: Sagebrush slopes to alpine ridges and talus, often in serpentine soils.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
– northern fairy-candelabra, rock-jasmine
Distribution: Occurring in the North Cascades in Washington; Alaska to California; east to the Rocky Mountains, northern Great Plains, and east to Newfoundland; circumpolar.
Habitat: Alpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Annual
– threeleaf anemone, Columbian windflower
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to California.
Habitat: Dry to moist woodlands at low to middle elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
–
Drummond's anemone, Drummond's windflower
Distribution: Occurring in the Olympic and Cascade Mountains in Washington; Alaska to California, east to Montana and Wyoming.
Habitat: Subalpine to alpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Drummond's anemone, Drummond's windflower
– little mountain anemone, Lyall's anemone, Lyall's windflower
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Low elevation prairies to subalpine ridges.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
–
cliff anemone, Pacific anemone
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: From forest openings in the foothills to alpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– cliff anemone, Pacific anemone, Pacific windflower
– hirsute anemone, hirsute windflower
– mountain pasqueflower, western pasqueflower
Distribution: Occurring in the Olympic and Cascade mountains in Washington; British Columbia to California, east to Alberta, Montana, Idaho, and the Wallowa Mountains of Oregon.
Habitat: Open slopes and meadows from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
Oregon anemone, Oregon windflower
Distribution: Occurring in forested areas on both sides of the Cascades crest in Washington; Washington to northern California.
Habitat: Moist, open woods, low to mid-elevations in the mountains, also in marshes and bogs along the coast.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
– Oregon anemone, western wood anemone
– Oregon anemone, western wood anemone
– northern anemone, small-flowered anemone, northern windflower
Distribution: Occurring on both sides of the Cascades crest in the North Cascades in Washington; Alaska to northern Washington, east to Montana and Wyoming, in scattered locations in Utah and Colorado, and also east across northern Canada to the Atlantic Coast.
Habitat: Mountain meadows and subalpine stream banks.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
pasqueflower, prairie-crocus
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington, where disjunct from the main species range; Alaska, south in the Rocky Mountains to New Mexico, east to the northern Great Plains and the Great Lakes region.
Habitat: Prairies to mountain slopes, mostly on well-drained soil.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– cliff anemone
– Piper's anemone, Piper's windflower
Distribution: Occurring east of the Cascades crest in Washington in the far eastern part of the state; Washington to northeast Oregon east to Idaho and western Montana.
Habitat: Shady woods at moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– dill
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Introduced from Asia
Flowers: May-August
Growth Duration: Annual
– Lyall's angelica, sharp-tooth angelica
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta and Utah.
Habitat: Stream banks, wet meadows, marshes and bottomlands, from the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Canby's angelica
Distribution: Occurring chiefly east of the Cascades crest in Washington, though disjunct on the Olympic Peninsula; northern Washington to central and northeastern Oregon.
Habitat: Meadows and forest openings, generally where moist, from low to middle elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– kneeling angelica
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east in British Columbia to the Selkirk Mountains.
Habitat: Stream banks, wet meadows and other moist places, from low to middle elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– Henderson's angelica, woolly angelica
Distribution: Occurring on the outer coast in Washington; northwestern Washington to California.
Habitat: Coastal bluffs and sand dunes.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
– seacoast angelica, sea-watch
Distribution: Occurring west of the Cascades crest in Washington in the coastal counties; Alaska to California, also in eastern North America; Far East Russia.
Habitat: Coastal bluffs, beaches, and estuaries.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– woodland tarplant, woodland tarweed
Distribution: Occurring west of the Cascades crest in lowland western Washington; Southern British Columbia to southern California.
Habitat: Open woods and woodland edge, and thickets.
Origin: Native
Flowers: May-July
Growth Duration: Biennial, Perennial
– alpine pussytoes
Distribution: Occurring in the North Cascades Mountains in Washington; Alaska to Washington, Montana, and Wyoming, east across Canada; circumboreal.
Habitat: Alpine meadows.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– tall pussytoes
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia, including southern Vancouver Island, to Oregon, east to Sasketchewan, Montana, Colorado, and Nevada.
Habitat: Grassy hillsides, open woodlands, and ponderosa pine forest openings from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
– flat topped pussytoes, meadow pussytoes
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Streamsides, willow thickets and moist meadows in subalpine and alpine areas.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– cushion pussytoes, low pussytoes
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Nebraska.
Habitat: Dry, open places in sagebrush desert to ponderosa pine forest openings, often on lithosol.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– stoloniferous pussytoes, whip pussytoes
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Wyoming, South Dakota, and Nevada.
Habitat: Sagebrush desert to dry, open areas at middle elevations, often in lithosol.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– Geyer's pussytoes, pinewoods pussytoes
Distribution: Occurring east of the Cascades crest in southern Washington; southern Washington to California, east to Nevada.
Habitat: Rocky slopes with ash, sand, or pumice soils, lithosols, and open forest.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
–
Howell's pussytoes
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Rocky or sandy slopes, dry to moist grasslands, and forest openings at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Howell's pussytoes
– northern pussytoes
– woolly pussytoes
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Utah.
Habitat: Dry or moist subalpine to alpine meadows, rocky slopes, and ridges.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
–
silvery-brown pussytoes, woodrush pussytoes
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and South Dakota.
Habitat: Sagebrush grasslands at low elevations to dry, rocky slopes at middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– silvery brown pussytoes, woodrush pussytoes
– alpine pussytoes, Rocky Mountain pussytoes
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains; circumboreal
Habitat: On rocky slopes and ridges, and in talus and pumice, from subalpine to alpine meadows.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– little-leaf pussytoes, rosy pussytoes, white pussytoes
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– pygmy pussytoes, single-headed pussytoes
Distribution: Reported from the North Cascades in Washington; Alaska to British Columbia, east to Alberta, Montana, and Wyoming; also in the Russian Far East.
Habitat: Alpine meadows, ridges, and rocky outcroppings.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– little-leaf pussytoes, Nuttall's pussytoes
Distribution: Occurring east of the Cascades crest in northeastern Washington; British Columbia to Oregon, east to the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Meadows, open forest, gravelly slopes, and sandy flats from the lowlands middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– showy pussytoes
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Washington, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Streams, wet thickets and meadows, and peatlands from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– white pussytoes
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Yukon Territory to northern Washington, east to Alberta and Montana.
Habitat: Alpine areas where rocky.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
– Hooker's pussytoes, raceme pussytoes
Distribution: Widely distributed in mountainous areas on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: Dry to damp rocky slopes, forest openings, and ledges from low to elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– narrowleaved pussytoes
Distribution: Occurring east of the Cascades crest in Washington; Washington to Nevada, east to central Idaho.
Habitat: Rocky slopes, flats, lithosol areas, and dry grasslands in sagebrush desert.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– brown-bract pussytoes, umber pussytoes
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Saskatchewan, Montana, Wyoming, and Colorado.
Habitat: Forest openings at middle elevations to subalpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– corn chamomile, field chamomile
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains in the U.S, widespread from the midwestern U.S. to eastern North America.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas generally at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Annual
– mayweed chamomile, stinking chamomile, dogfennel
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed areas generally at low elevations.
Origin: Introduced from Europe
Flowers: May-October
Growth Duration: Annual
–
annual vernalgrass
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California; occurring throughout most of central and eastern half of North America.
Habitat: Meadows, grasslands, forest openings, and other disturbed, open areas at low to moderate elevations.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
– small sweet vernal grass
– sweet vernalgrass
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, southern Great Plains, and eastern North America.
Habitat: Roadsides, fields, meadows, prairies, balds, lawns, and other disturbed open areas at low elevations.
Origin: Introduced from Europe
Flowers: April-July
Growth Duration: Perennial
– burr chervil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across much of the United States and parts of Canada to the Atlantic Coast.
Habitat: Roadsides, forest edges, wastelots, and other disturbed areas where often seasonally moist.
Origin: Introduced from Eurasia
Flowers: April-July
Growth Duration: Annual
– wild chervil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, also in eastern North America and Greenland.
Habitat: Roadsides, fields, forest edge, wastelots, and other disturbed areas where seasonally moist.
Origin: Introduced from Eurasia
Flowers: May-August
Growth Duration: Annual
– glaucous death-camas
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon and Nevada, east across much of North America to the Atlantic Coast.
Habitat: Meadow, open forests and rocky slopes, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– bronze bells, mission bells, western featherbells
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Idaho, and Montana.
Habitat: Wet cliffs, moist meadows and scree, mostly at middle to high elevations, but down to near sea level in the Olympic Peninsula and the Columbia River Gorge.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– garden snapdragon, greater snapdragon
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, east to Idaho; also in eastern North America.
Habitat: Disturbed areas in urban settings.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
– dense silky-bent
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains; also in the central U.S., Great Lakes region, and northeastern U.S.
Habitat: Dry wasteland and other disturbed areas in shrub-steppe and open coniferous forests.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
– western lady's-mantle, field parsley-piert
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southern British Columbia to California, reported in Idaho, also along Atlantic Coast in the U.S.
Habitat: Ledges, often limy, sandy shores, hot springs, and other disturbed open ground at low elevations.
Origin: Introduced from Eurasia and northern Africa
Flowers: April-May
Growth Duration: Annual
– small-fruited parsley-piert
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to northwestern Oregon, also in southeastern U.S.
Habitat: Openings, shores, lawns, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
– western parsley-piert
Distribution: Occurring west of the Cascades crest in lowland western Washington and east in the Columbia River Gorge; southern British Columbia to California.
Habitat: Vernally damp grasslands, balds, fields, ledges, rocky slopes, open forest, shores, and beaches at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
–
California broomrape
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; southwestern British Columbia to Baja California, also east of the Cascades crest in Oregon.
Habitat: Coastal and sub-coastal, or in meadows inland, parasitic on Asteraceae but not on
Artemisia tridentata.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Perennial
– California broomrape
– Gray's California broomrape
–
flat-topped broomrape
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and the Canadian Great Plains.
Habitat: Sagebrush desert areas, parasitic mainly on
Artemisia tridentata.
Origin: Native
Flowers: May-July
Growth Duration: Annual, Perennial
– flat-topped broomrape
– flat-topped broomrape
– clustered broomrape
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains and the Great Lakes region.
Habitat: Dry, open places, valleys to montane, parasitic exclusively on Artemisia.
Origin: Native
Flowers: May-July
Growth Duration: Annual
– clustered broomrape
Distribution: Occurring on both sides of the Cascades crest in Washington; southwestern British Columbia to Baja California, east to the Rocky Mountains and Texas.
Habitat: Open areas from low to middle elevations. Parasitic on Eriogonum, Eriophyllum lanatum, and Phacelia, also other taxa outside of Washington, but never Artemisia.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
– Louisiana broomrape, Suksdorf's broomrape
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to the Rocky Mountains and Great Plains of Canada and the U.S.
Habitat: Dry, open, often sandy areas, parasitic on Artemisia, Chrysopsis, and other woody Asteraceae.
Origin: Native
Flowers: May-July
Growth Duration: Annual
– pine broomrape, pinewoods broomrape
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California, east to northern Idaho, Nevada and New Mexico.
Habitat: Montane coniferous forest, parasitic on Holodiscus.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta and the Rocky Mountains.
Habitat: From lowland to montane, often where open and seasonally moist, parasitic mainly on Asteraceae, Saxifragaceae, and Sedum.
Origin: Native
Flowers: April-August
Growth Duration: Annual
–
celery
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to California, east to Idaho, Utah, and Nevada, east across the southern U.S. to eastern North America.
Habitat: Disturbed ground, usually where moist, where escaped from nearby cultivation.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
– flytrap dogbane, spreading dogbane
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Common in forest openings, thickets, hillsides, roadsides, meadows and other open areas with dry soil, from low elevations to nearly subalpine areas.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– clasping-leaved dogbane, common dogbane, hemp dogbane
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Stream banks, moist hillsides and forest openings, fields, and wastelots at low to middle elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– western dogbane
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Dry, open areas, gen in valleys and at lower elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– yellow columbine
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to the Rocky Mountains.
Habitat: Moist mountain meadows and talus to alpine slopes
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
red columbine, Sitka columbine
Distribution: Widely distributed on both sides of the Cascades crest throughout Washington; Alaska to California, coastal and inland to Alberta and Wyoming.
Habitat: Open woods, from the lowlands to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– red columbine, Sitka columbine, western columbine
– hybrid columbine
Distribution: Occurring east of the Cascades crest in central Washington; British Columbia to Washington, east to Idaho.
Habitat: Moist mountain meadows and talus to alpine slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– European Columbine
Distribution: Introduced as a garden flower, occasionally escaping.
Habitat: Disturbed soil near gardens.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
– kamchatka rockcress, lyre-leaved rockcress, western rockcress
Distribution: Occurring west of the Cascades crest in northwestern Washington; Alaska to Washington, east to Northwest Territory and Sasketchewan.
Habitat: Subalpine and alpine scree and talus slopes.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– mouse-ear cress, thalecress
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America.
Habitat: Disturbed areas, particularly near cities and towns.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Annual
– mountain rockcress
Distribution: Known only from San Juan County in Washington; Yukon Territory to northwestern Washington.
Habitat: Open, disturbed areas at low elevation, often near where cultivated.
Origin: Introduced
Flowers: May-June
Growth Duration: Perennial
– crosshaired rockcress
Distribution: Occurring in the southeastern corner of Washington; Snake River canyon, Asotin County, Washington, east to west-central Idaho.
Habitat: Wet banks to moist soil or coniferous woods.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– hairy rockcress, Pacific coast rockcress
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Rocky Mountains.
Habitat: Open areas, often in waste places, from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Annual, Biennial, Perennial
– Cascade rockcress, Columbia Gorge rockcress, fork-haired rockcress
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to Oregon.
Habitat: Open slopes, meadows, and ridgelines in alpine and subalpine areas, and exposed areas in the Columbia River Gorge.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Nuttall's rockcress
Distribution: Occurring east of the Cascades crest in Washington; eastern British Columbia to eastern Washington, east to Alberta, Montana, Wyoming, and Utah.
Habitat: Moist flats, often sheltered by shrubs, from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
– Olympics rockcress
Distribution: Occurring west of the Cascades crest in Washington, where endemic to the Olympic Mountains.
Habitat: Talus slopes and subalpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– wild sarsaparilla
Distribution: Occurring east of the Cascades crest in northeastern Washington; Yukon Territory to northeastern Washington, east to and south in Rocky Mountains, east to eastern North America.
Habitat: Moist, shaded soil.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– Pacific madrona, Pacific madrone
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Chiefly in drier, often rocky areas at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– strawberry tree
Distribution: Occurring west of the Cascades crest in Washington; currently known as escaped from cultivation in Washington.
Habitat: Disturbed, open to partially sunny areas in and around urban areas, where escaped from cultivation.
Origin: Introduced
Flowers: April-September
Growth Duration: Perennial
– white fir dwarf mistletoe
Distribution: Occurring on both sides of the Cascades crest in southern Washington; southern Washington to California, east to Utah, Nevada, and Arizona.
Habitat: Primarily on Abies grandis and A. concolor in our area, rarely on adj A. amabilis and Pinus spp. in Oregon Cascades.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– lodgepole pine dwarf mistletoe
Distribution: Occurring chiefly east of the Cascades rest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Parasitic on Pinus, usually on Pinus contorta.
Origin: Native
Flowers: April- June
Growth Duration: Perennial
– western dwarf mistletoe
Distribution: Occurring chiefly east of the Cascades crest in Washington; eastern Washington to California, east to northern and central Idaho.
Habitat: Parasitic primarily on Pinus ponderosa, occasionally on adjacent P. contorta vars. latifolia and murrayana and rarely on P. lambertiana, not known on Tsuga or Larix;
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– Douglas-fir dwarf mistletoe
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Parasitic primarily on Pseudotsuga menziesii, rarely on adjacent Abies and Picea.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– larch dwarf mistletoe
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho and Montana.
Habitat: Primarily on Larix occidentalis and Tsuga mertensiana, occasionally on adjacent Pinus contorta, P. ponderosa, and Abies lasiocarpa, not on Tsuga heterophylla.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
hemlock dwarf mistletoe
Distribution: Occurring west of the Cascades crest in Washington; southeastern Alaska to California.
Habitat: Parasitic primarily on Tsuga heterophylla, and also Abies amabilis, A. procera, and occasionally adjacent A. grandis.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– hemlock dwarf mistletoe
– hemlock dwarf mistletoe
– Cooley's buttercup
Distribution: Occurring west of the Cascades crest in Washington; Alaska to Washington.
Habitat: Damp slopes and rocky crevices at high elevations, blossoming as snow recedes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– great burdock, greater burdock
Distribution: Known from a few scattered locations in Washington; British Columbia to California, in Montana, east from California to Colorado and Arizona, also across Canadian Great Plains to Great Lakes region and northeastern North America.
Habitat: Roadsides, ditches, forest openings and edge, wastelots, and other disturbed areas generally at low elevations.
Origin: Introduced from Eurasia
Flowers: August-October
Growth Duration: Biennial, Perennial
– common burdock, lesser burdock
Distribution: Occurring on both sides of the Cascades crest in Washington; British to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, meadows, wastelots, and other disturbed open areas at low to middle elevations.
Origin: Introduced
Flowers: July-October
Growth Duration: Biennial
– bristly manzanita
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Dry forest openings and rocky slopes, mostly at low elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– medium manzanita
Distribution: Occurring west of the Cascades crest in Washington, chiefly on the east side of the Olympic Peninsula. Washington to Oregon.
Habitat: Rocky balds and forest openings from low to moderate elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
–
pinemat manzanita
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Dry forest edge and openings from middle elevations in the mountains to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– pinemat manzanita
–
green-leaf manzanita
Distribution: Occurring east of the Cascades crest in Washington, where disjunct in Chelan County, otherwise in Klickitat County only; Washington to California, east to Montana and Colorado.
Habitat: Chaparral and dry, open forests.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– green-leaf manzanita
– red bearberry, kinnikinnick
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California east to the Rocky Mountains, also further east across the northern U.S. and Canada to the Atlantic Coast; circumboreal.
Habitat: Coastal bluffs and prairies, rocky balds, dry subalpine meadows, and dry coniferous forest openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– marsh sandwort
Distribution: Presumed extirpated from Washington; historically west of the Cascades crest along the coast. California to Central America.
Habitat: Swampy places, mostly along coast.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
thyme-leaf sandwort
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Dry to moist, barren to wooded places.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
– thyme-leaf sandwort
–
threeawn
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to central Canada and the central U.S.
Habitat: Desert plains, grasslands, and pondersoa pine forests.
Origin: Native
Flowers: June-July
Growth Duration: Annual, Perennial
– red threeawn
– Jersey thrift
Distribution: Occurring west of the Cascades crest in Washington; not known from elsewhere in North America.
Habitat: Roadsides, fields, ditches, and other disturbed open areas at low elevations.
Origin: Introduced from Europe
Flowers: April-July
Growth Duration: Perennial
–
sea-pink, thrift
Distribution: Occurring west of the Cascades crest in Washington, chiefly in the coastal counties; Alaska to California, east across Canada to northeastern North America; Greenland and Europe.
Habitat: Along beaches, coastal bluffs and balds, occasionally inland in prairies.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
– sea-pink, thrift
– sea-pink, thrift
– horseradish
Distribution: Occurring in scattered locations east of the Cascades crest in Washington; Alaska to California, east across the U.S. and Canada to the Atlantic Coast.
Habitat: Disturbed areas including fields, roadsides and wastelots.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
– leafy arnica, meadow arnica, narrowleaf arnica, silvery arnica, leafy leapordbane
Distribution: Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Meadows and wet places from middle elevations to the subalpine.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– heart-leaf arnica, heart-leaf leopardbane
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, and the Great Lakes region.
Habitat: Light forest understory, openings, and edge, from low elevations to the subalpine.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– rayless arnica, rayless leopardbane
Distribution: Occurring in the Cascades Mountains of Klickitat and Skamania counties in Washington; Washington to California, east to Nevada.
Habitat: Forest openings from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– hillside arnica, orange arnica, shining leopardbane
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows and open slopes from the foothills to middle elevations in the mountains
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– slender arnica, slender leopardbane
Distribution: Occurring on both sides of the Cascades crest in the mountainous areas in Washington; British Columbia to Oregon, east to Alberta, Montana, Wyoming, and Utah.
Habitat: Dry, rocky slopes and meadows, from the subalpine to alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
clasping arnica, stream bank arnica
Distribution: Occurring on both sides of the Cascades crest in Washington, including the Olympic Mountains and the northeastern region; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Habitat: Streambanks, moist woods and meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– clasping arnica, streambank arnica, streambank leopardbane
– broad-leaved arnica, mountain arnica, daffodil leopardbane
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Common in forest openings and meadows, and open, rocky areas from middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– longleaf arnica, seep spring arnica, spear-leaf leopardbane
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, from middle elevations to the alpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– cordilleran arnica, hairy arnica, cordilleran leopardbane
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist meadows from middle elevations to the alpine.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
– Nevada arnica, Sierra arnica, Sierran leopardbane
Distribution: Occurring in the Cascades and Olympic mountains in Washington; Washington to California, east to Nevada.
Habitat: Open, rocky slopes and forest openings in the subalpine and alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– sticky arnica, sticky-leaf arnica
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana and Utah.
Habitat: Rocky places from middle elevations to the subalpine and alpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– Parry's arnica
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains.
Habitat: Open woods and meadows, from middle elevations to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Rydberg's arnica, subalpine arnica, subalpine leopardbane
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Colorado.
Habitat: Dry meadows and open slopes at high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– bunch arnica, twin arnica, twin leopardbane
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: From low elevation prairies and grasslands to coniferous forest openings at middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– black chokeberry
Origin: Introduced
– bulbous oatgrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Meadows, balds, pastures, fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
– absinthe, old-man, wormwood
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Eurasia
Flowers: July-September
Growth Duration: Perennial
– sweet Annie, sweet sagewort, annual wormwood
Distribution: Occurring in scattered locations east of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed open places.
Origin: Introduced from Eurasia
Flowers: August-October
Growth Duration: Annual
–
dwarf sagebrush, low sagebrush
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to the Rocky Mountains.
Habitat: Open, dry plains and hills in sagebrush desert.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– little sagebrush, low sagebrush
– biennial wormwood
Distribution: Occurring on both sides of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to California, east across most of North America to the Atlantic Coast, where considered introduced.
Habitat: Roadsides, fields, irrigation ditches, streambanks, and other disturbed open areas, especially in sandy soil.
Origin: Native
Flowers: August-October
Growth Duration: Annual, Biennial
–
Pacific sagewort, northern wormwood
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast; also in Eurasia.
Habitat: Open places, often in sandy or rocky soil, from low elevations to alpine.
Origin: Native
Flowers: July-September
Growth Duration: Biennial, Perennial
– northern wormwood
– Pacific sagewort, Scouler's wormwood
– Columbia Islands sagewort, Wormskiold's wormwood sagewort
–
hoary sagebrush, silver sagebrush
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows and forest openings from low to middle elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– Bolander's hairy sagebrush
– Douglas's mugwort, Douglas's sagewort, Douglas's wormwood
Distribution: Occurring on both sides of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California, east to Nevada.
Habitat: Mostly along stream banks and river bottoms.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– dragon sagewort, tarragon, dragon wormwood
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains and Great Lakes region.
Habitat: Sagebrush desert to ponderosa pine forest openings at middle elevations.
Origin: Native
Flowers: July-October
Growth Duration: Perennial
– prairie sagebrush, prairie sagewort
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Washington, east to the Great Plains, Great Lakes region, and northeastern North America.
Habitat: Dry, open sagebrush plains and foothills.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– three-forked mugwort, forked wormwood
Distribution: Occurring in the Cascades and Olympic Mountains of Washington; Alaska to Washington, east to Northwest Territories, Alberta, and Nunavut.
Habitat: Open, rocky ledges and talus slopes in the subalpine and alpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
–
western mugwort, prairie sage
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Meadows and open slopes, from the lowlands to the alpine.
Origin: Native
Flowers: June-October
Growth Duration: Perennial
– gray sagewort
– intermediate sagewort, mountain wormwood
– Lindley's western mugwort, Lindley's prairie sage
– western mugwort, Louisiana sagewort, silver wormwood
– Michaux's mugwort, lemon sagewort, Michaux's wormwood
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta and Wyoming.
Habitat: Rocky places in the mountains at rather high elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
–
mountain sagewort, boreal wormwood
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Subalpine and alpine areas, typically where moist.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– mountain sagewort
– scabland sagebrush, stiff sagebrush
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho and Montana.
Habitat: Dry, rocky places from the plains and foothills to moderate elevations in the mountains.
Origin: Native
Flowers: September-October
Growth Duration: Perennial
– snowfield sagebrush, spiked sagebrush
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to southwestern Montana, Wyoming, and Colorado.
Habitat: Cool, moist slopes, from middle elevations to subalpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– dusty miller, old-woman, beach wormwood, Steller's wormwood
Distribution: Occurring west of the Cascades crest along the northeastern coast of the Olympic Peninsula in Washington; native to Alaska, also occurring from the Great Lakes region east to northeastern North America.
Habitat: Coastal dunes and beaches in developed coastal areas, where escaping from cultivation.
Origin: Introduced
Flowers: May-September
Growth Duration: Perennial
– coastal mugwort, Suksdorf's sagewort, coastal wormwood
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California.
Habitat: Bluffs, beaches, rocky areas, and riverbanks, especially near the coast.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Aleutian mugwort, Cascade wormwood
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; Alaska to Oregon, east to Montana, and east across Canada to Quebec.
Habitat: Open rocky or gravelly, wet or dry sites, from middle elevations to the alpine, descending to sea level northward.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
–
big sagebrush
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Dry plains and foothills to the subalpine, but not in lithosol or alkaline soil.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– big sagebrush
– mountain big sagebrush, Vasey sagebrush
– Wyoming sagebrush
–
cut-leaf sagebrush, threetip sagebrush
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon and Nevada, east to Idaho and Wyoming.
Habitat: Sagebrush desert and grasslands.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– cutleaf sagebrush, threetip sagebrush
– mugwort, lobed wormwood
Distribution: Occurring on both sides of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to Oregon, east to Montana, east across Canada to the Great Lakes region and eastern North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas.
Origin: Introduced from Eurasia
Flowers: August-October
Growth Duration: Perennial
–
Italian arum, Italian lords and ladies
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to California; also in scattered location in central and eastern U.S.
Habitat: Forest understory and disturbed locations near urbanized areas.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
– Italian arum, Italian lords and ladies
–
sylvan goatsbeard
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Alberta, also in the eastern half of North America.
Habitat: Moist forest and forest edge from low elevations to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Sylvan goatsbeard
– wild ginger
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho and Montana.
Habitat: Moist, shady woods at low to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– Humboldt milkweed, pallid milkweed
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to California, east to Idaho, Wyoming, and Colorado.
Habitat: Gravelly to heavy clay soil in the foothills and lower mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Mexican whorled milkweed, narrow-leaf milkweed
Distribution: Occurring east of the Cascades crest in Washington; northeastern Washington to Baja California, Mexico, east to Idaho, Utah, and Arizona.
Habitat: Sagebrush desert, usually along vernal stream beds.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– swamp milkweed
Distribution: Known from Okanogan County in Washington; Washington, also in Idaho, east across North America to Atlantic Coast.
Habitat: Riparian zone, including standing water
Origin: Introduced?
Flowers: August
Growth Duration: Perennial
– showy milkweed
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to Mexico, east to the Great Plains and Great Lakes region.
Habitat: Riparian corridors, irrigation ditches, roadsides, and other at least seasonally wet areas at low elevations, often in loam soils.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– low hawksbeard
Distribution: Occurring in the Olympic and Cascades mountains in Washington; Alaska to California, east to Nunavut and Colorado, also in northeastern Canada; Asia.
Habitat: Talus, scree, moraines, sandy or gravelly slopes, subalpine to alpine.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– asparagus
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Garden escape, often of roadsides, fields, wastelots, and other disturbed areas..
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
– catchweed, madwort
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains, also in eastern North America.
Habitat: Roadsides, fields, irrigation ditches, and other disturbed open areas where moist.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual
– Oregon , Indian's dream, podfern
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, South Dakota, western Wyoming, and northern Utah; disjunct in Quebec.
Habitat: Cliff crevices and moist, rocky slopes, foothills to near timberline, often on serpentine
Origin: Native
Growth Duration: Perennial
–
maidenhair spleenwort
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, also in southern Rocky Mountain states and in central U.S. and eastern North America.
Habitat: Cliff crevices, rocky outcroppings, and talus slopes, generally where moist.
Origin: Native
Spores: May-September
Growth Duration: Perennial
– maidenhair spleenwort
– maidenhair spleenwort
– green spleenwort
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across northern North America to New England and the Canadian Maritimes; circumboreal.
Habitat: Cliff crevices, especially on limestone, often near or above timberline.
Origin: Native
Growth Duration: Perennial
– cock's-head, field milk vetch, purple milk vetch
Distribution: Occurring east of the Cascades crest in Washington; Yukon Territory to California, east across North America to Canada's Atlantic Coast.
Habitat: Moist spots in sagebrush plains, and mountain meadows to alpine slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
–
alpine milk-vetch, purple milk-vetch
Distribution: Occurring east of the Cascades crest in the north-central region of Washington; Alaska to northeastern Oregon and northeastern Nevada, east to the Rocky Mountains; circumboreal.
Habitat: Open slopes and rocky areas from upper montane to alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– alpine milk-vetch
– hanging pod milk-vetch, Palouse milk-vetch
Distribution: Occurring east of the Cascades crest in Washington, where known from Lincoln and Whitman; eastern Washington to adjacent Idaho.
Habitat: Sagebrush flats to open ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Arthur's milk-vetch
Distribution: Occurring east of the Cascades crest, where known only from Asotin County in Washington; southeastern Washington to northeastern Oregon and adjacent west-central Idaho.
Habitat: Grassy hills and rocky meadows, often on basalt.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Origin: Native
Growth Duration: Perennial
– Asotin milk-vetch
Distribution: Occurring east of the Cascades crest, where known only from Asotin County in Washington; Endemic to Snake River Canyon of southeastern Washington and adjacent Idaho.
Habitat: Grassy slopes in shrub-steppe at low to moderate elevations.
Origin: Native
Flowers: March-May
Growth Duration: Perennial
–
Indian milk-vetch, subarctic milk-vetch
Distribution: Occurring west of the Cascades crest in the Olympic Mountains in Washington; Alaska to the Olympic mountains, northeastern Oregon, Nevada, Utah, and Colorado, east to the Great Plains and eastern Canada.
Habitat: Foothill bluffs and riverbanks to subalpine and alpine ridges and scree.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Cotton's milk-vetch, Cotton's milkvetch
–
Beckwith's milk-vetch
Distribution: Occurring east of the Cascades crest in the southeastern region of Washington; southeastern Washington to northeastern Nevada, east to western Idaho along the Snake River drainage, also disjunct in Kamloops, British Columbia.
Habitat: Sagebrush desert to dry hillsides.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Beckwith's milk-vetch
–
Canada milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Prairies, stream banks, ditches, ponderosa pine forest openings, and seasonally moist alkaline flats in sagebrush.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Canada milk-vetch
– Canada milk-vetch
– Morton's Canadian milk-vetch
– buckwheat milk-vetch
Distribution: Occurring east of the Cascades crest in the south-central Washington; Washington south along the Snake River corridor to Oregon and southwestern Idaho.
Habitat: Grasslands, dry and sandy slopes in sagebrush habitat.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– chickpea milk-vetch
Distribution: Occurring In scattered locations chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountain states and in eastern North America.
Habitat: Roadsides, fields, dry slopes, and other disturbed areas, often where moist or wet.
Origin: Introduced from Europe
Flowers: July-August
Growth Duration: Perennial
–
hill milk-vetch, hillside milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to Oregon, east to west-central Idaho along the Snake and Clearwater Rivers.
Habitat: Basaltic grasslands and sagebrush deserts.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– hillside milk-vetch
– Columbian milk-vetch
Distribution: Occurring east of the Cascades crest in Washington, where endemic to south-central Washington.
Habitat: Dry, open areas in shrub-steppe.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
–
basalt milk-vetch, stiff milk-vetch
Distribution: Occurring east of the Cascades crest from south-central to southeastern Washington; Washington to southeast Oregon and adjacent southwestern Idaho.
Habitat: Sagebrush grasslands to brushy slopes and ponderosa pine forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– stiff milk-vetch
–
Cusick's milk-vetch
Distribution: Occurring east of the Cascades crest in southeastern Washington; Washington to east-central Oregon, east to central Idaho.
Habitat: Sagebrush plains to grassy or rocky slopes, often on talus.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
– Cusick's milk-vetch
– John Day milk-vetch, transparent milk-vetch
Distribution: Known historically from Klickitat County in Washington, but now thought to be extirpated; Klickitat County, Washington to Wheeler and Grant counties in Oregon.
Habitat: Gravel bars, alluvial slopes, and in thin gravelly soil overlying basaltic rock.
Origin: Native
Flowers: May-June
Growth Duration: Annual, Biennial
– Russian milk-vetch, sickle milk-vetch
Distribution: Occurring east of the Cascades crest, where known from Whitman County in Washington; British Columbia to Washington and Montana, also in a few scattered locations across North America.
Habitat: Disturbed, open areas.
Origin: Introduced from Eurasia
Flowers: July
Growth Duration: Perennial
– basalt milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to northeast California, east to Nevada and Idaho.
Habitat: Sagebrush plains and lower foothills.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
–
Geyer's milk-vetch
Distribution: Occurring east of the Cascades crest in south-central Washington; disjunct in British Columbia and along Columbia River of Washington and north-central Oregon; otherwise southeastern Oregon to Nevada and California, east to Montana, Wyoming, and Utah.
Habitat: Sandy desert areas, especially on dunes.
Origin: Native
Flowers: June-July
Growth Duration: Annual, Biennial
– Geyer's milk-vetch
– Hood River milk-vetch
Distribution: Occurring in the east end of the Columbia River Gorge in Klickitat County in Washington; Klickitat County, Washington to Hood River and Wasco counties in Oregon.
Habitat: Dry, open areas in sagebrush and grasslands.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Howell's milk-vetch
Distribution: Occurring east of the Cascades crest in the southeastern corner of Washington; southeastern Washington to north-central Oregon.
Habitat: Stony hillsides among sagebrush and bunchgrass, often over basalt.
Origin: Native
Flowers: Arpil-June
Growth Duration: Perennial
– bent milk-vetch, hairy milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; south-central Washington to Oregon, east to Idaho and Montana.
Habitat: Dry hillsides in sagebrush desert.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
–
spiny milk-vetch, thistle milk-vetch
Distribution: Known historically from Walla Walla County but considered extirpated; southern Alberta to east-central California, east to Rocky Mountains and northern Great Plains.
Habitat: Sandy deserts to alpine ridges.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– spiny millk-vetch, thistle milk-vetch
–
Laxmann's milk-vetch, standing milk-vetch
Distribution: Occurring in north-central and eastern Washington; Yukon Territory to Washington, east to the Rocky Mountains and Minnesota.
Habitat: Prairies to rocky foothills in sagebrush desert and ponderosa pine forest.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– standing milk-vetch
– Leiberg's milk-vetch
Distribution: Endemic to Douglas, Kittitas and Chelan counties of central Washington.
Habitat: Dry hillsides and plains, commonly in sagebrush scabland on basalt.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
–
freckled milk-vetch, specklepod milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Texas.
Habitat: Open areas, desert flats to subalpine slopes.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– freckled milk-vetch, specklepod milk-vetch
– Lyall's milk-vetch
Distribution: Endemic to Washington from Kittitas and Douglas counties south to Benton, east to Grant and Adams counties.
Habitat: Sagebrush and desert areas, especially on sand dunes.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– lesser-bladder milk-vetch
Distribution: Occurring chiefly east of the Cascades crest in the northeastern counties of Washington, but also disjunct on the Olympic Peninsula; southern British Columbia to Washington, east to Montana and Wyoming.
Habitat: Prairies and foothills to ponderosa pine forests.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
–
pauper milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon.
Habitat: Dry, open areas in shrub-steppe.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– pauper milk-vetch
–
weedy milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to central Washington, Rocky Mountains and northern Great Plains.
Habitat: Grasslands and foothills to montane forests, dry ridges and occasionally alpine meadows.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
– weedy milk-vetch
– weedy milk-vetch
–
Ames's milk-vetch
Distribution: Known only from Mt. Adams and Klickitat County in Washington; Occurring in the northern Sierra Nevada of California and adjacent Nevada; not reported from Oregon.
Habitat: Sandy and gravelly flats in sagebrush and open pine forests on basalt.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
– Ames's milk-vetch
–
Pursh's milk-vetch, woolly-pod milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Prairies and sagebrush deserts, foothills and lower mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– woolly-pod milk-vetch
– Pursh's milk-vetch, woolly-pod milk-vetch
– Yakima milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; Washington to Sherman County in Oregon.
Habitat: Shrub-steppe to low, dry, open ponderosa pine forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Blue Mts. milk-vetch, longleaf milk-vetch
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; Washington to northeastern Oregon.
Habitat: Pondersoa pine forest openings at low to moderate elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Piper's milk-vetch
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern WA east to adjacent Idaho.
Habitat: Dry bluffs and canyon banks.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
–
Robbins's milk-vetch
Distribution: Occurring east of the Cascades crest in the northern counties in Washington; Alaska to Oregon,east to Alberta and south in the Rocky Mountains to Colorado, also in eastern North America.
Habitat: Stream banks and alpine slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– Robbin's milk-vetch
– stalked-pod milk-vetch, The Dalles milk-vetch, woody-pod milk-vetch
Distribution: Occurring east of the Cascades crest chiefly in the Columbia River Basin and Columbia River Gorge in Washington; south-central British Columbia to north-central Oregon.
Habitat: Dunes and sandy barrens, low elevation
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– Sheldon's milk-vetch
Distribution: Occurring east of the Cascades crest in Asotin County in Washington; southeastern Washington to Oregon, east to Idaho.
Habitat: Shrub-steppe and ponderosa pine forest openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– Whited's milk-vetch
Distribution: Endemic to Chelan County in Washington.
Habitat: Among sagebrush on rocky hillsides.
Origin: Native
Flowers: May
Growth Duration: Perennial
– Spalding's milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; central Washington to northeast Oregon, east to western Idaho.
Habitat: Sagebrush and grasslands in the foothills and valleys.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
– curve-pod milk-vetch, medic milk-vetch, spiral-pod milk-vetch
Distribution: Endemic to Washington from Kittitas County south to Klickitat County, east to Grant County,
Habitat: Sagebrush desert.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
– crouching milk-vetch, sprawling milk-vetch
Distribution: Occurring east of the Cascades crest in Washington from Kittitas and Grant counties south; Washington to Umatilla and Gilliam Counties, Oregon.
Habitat: Sagebrush deserts, sandy barrens and lower foothills.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
– pulse milkvetch
Distribution: Disjunct in Douglas County in Washington; Yukon to southeastern Oregon and Nevada, east to Rocky Mountains.
Habitat: Prairies and foothills to lower mountains.
Origin: Native
Flowers: May
Growth Duration: Perennial
– Tweedy's milk-vetch
Distribution: Occurring east of the Cascades crest in Washington, from Yakima County south; central Washingtonto north-central Oregon near the Columbia River and lower Deschutes River.
Habitat: Sagebrush plains and foothills.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
–
balloon milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Idaho and Nevada.
Habitat: High, open, rocky ridges and slopes, often in serpentine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
– balloon milk-vetch
–
alpine lady-fern
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Montana, Wyoming and Colorado; also in northeastern Canada and Greenland.
Habitat: Open, rocky slopes and along streams at mid- to high elevations in the mountains.
Origin: Native
Growth Duration: Perennial
– American alpine lady-fern
–
lady-fern
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast; circumboreal.
Habitat: Moist woods, meadows, forest edge, and shaded riparian corridors from low to middle elevations.
Origin: Native
Spores: May-September
Growth Duration: Perennial
– lady fern, northwestern lady fern
– sandweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana.
Habitat: Dry, open, often grassy places.
Origin: Native
Flowers: March-June
Growth Duration: Annual
– sweet William catchfly
Distribution: Occurring in scattered locations west of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Wastelots, roadsides, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Annual
–
silver orache, silverscale orache
Distribution: Occurring east of the Cascades crest in Washington; central British Columbia to California, east to the Great Plains.
Habitat: Dry or alkaline soil.
Origin: Native
Flowers: July-September
Growth Duration: Annual, Perennial
– silver saltbush, silverscale
–
fourwing saltbush, hoary saltbush, shadscale, wingscale
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Great Plains.
Habitat: Sand or gravel slopes and sagebrush flats, saline or not.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
– hoary saltbush
– thickleaf orache, saline saltbush
Distribution: Occurring on both sides of the Cascades crest in Washington, but particularly common along the inner and outer marine coast; Yukon Territory to California, east to the Atlantic Coast.
Habitat: Salt marshes, sea beaches and headlands, also inland on disturbed or saline ground;
Origin: Native
Flowers: June-September
Growth Duration: Annual
–
Gardner's saltbush
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Sagebrush-steppe desert.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
– moundscale, gardner's saltbush, sickle saltbush, saltsage
–
Gmelin's orache, Gmelin's saltbush
Distribution: Occurring west of the Cascades crest along the coast in Washington; Alaska to California.
Habitat: On coastal beaches, strands, and rocky outcroppings near the high tide in saline soil.
Origin: Native
Flowers: June-September
Growth Duration: Annual
– Gmelin's orache, Gmelin's saltbush
– orache, Russian atriplex orache
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Great Plains; also in eastern North America.
Habitat: Riparian zones and adjacent fields; tolerant of alkaline.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Annual
– garden orache, French spinach
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains and in scattered locations in eastern North America.
Habitat: Disturbed areas, often where seasonally moist.
Origin: Introduced from Asia
Flowers: July-August
Growth Duration: Annual
– grassleaf orache, narrow-leaved orache
Distribution: Occurring west of the Cascades crest in Washington; also occurring in eastern North America.
Habitat: Coastal shoreline.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Annual, Perennial
– long-stalked orache, Baltic saltbush
Distribution: Occurring west of the Cascades crest in northwestern Washington; southwestern British Columbia to northwestern Washington.
Habitat: Marine gravel, mudflats.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Annual
– oblongleaf orache
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to Washington, east to Alberta and Montana.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-September
Growth Duration: Annual
– halberdleaf orache, spear orache
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic.
Habitat: Coastal and inland, saline or alkaline soil.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Annual
– fat hen, hastate orache, thin-leaf orache
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, in scattered location across Canada and the U.S. to the Atlantic Coast.
Habitat: Along the coast in saline soils, beaches, and strands; inland in alkaline soils.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Annual
– red orache, tumbling orache
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Great Plains; also in scattered locations in central and eastern U.S.
Habitat: Weedy species of irrigated land and roadsides.
Origin: Introduced from Eurasia
Flowers: July-September
Growth Duration: Annual
– wedge orache, wedgeleaf orache, wedgescale orache
Distribution: Occurring east of the Cascades crest in Washington; central British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Alkaline soil, flats and shores.
Origin: Native
Flowers: June-August
Growth Duration: Annual
– rockcress
Habitat: Disturbed areas, where escaping from nearby cultivation.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
– barbed oats
Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Montana, Arizona, and New Mexico.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced Eurasian
Flowers: May-June
Growth Duration: Annual
– wild oats
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-September
Growth Duration: Annual
– cultivated oats
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from the Mediterranean region
Flowers: June-August
Growth Duration: Annual
– duckweed fern, large mosquito fern
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Idaho and western Montana.
Habitat: Ponds, backwaters, slow-moving streams.
Origin: Native
Growth Duration: Annual
– Mexican waterfern fern, mosquito fern
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Texas.
Habitat: Ponds and backwaters, mostly at low elevations.
Origin: Native
Growth Duration: Annual, Perennial