Hybrid daffodil (Narcissus ×incomparabilis)
Distribution: Occurring west of the Cascades crest in lowland western Washington and in the Columbia River Gorge; southwestern British Columbia to southwestern Oregon
Habitat: Fields, roadsides, forest edge, and other disturbed areas at low elevation.
Origin: Introduced to gardens from Europe
Flowers: March-April
Growth Duration: Perennial

Daggerpod (Phoenicaulis cheiranthoides)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho and Nevada.
Habitat: Shrub-steppe and open ponderosa pine forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Cutleaf daisy (Erigeron compositus)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains, also in northern and eastern Canada.
Habitat: Sandy riverbanks at low elevations to rocky outcrops at mid- to high elevation in the mountains
Origin: Native
Flowers: May - August
Growth Duration: Perennial

Desert yellow daisy (Erigeron linearis)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Montana, Wyoming, and Utah.
Habitat: Dry, open, often rocky areas at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Hairy-seeded daisy (Erigeron poliospermus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to western Idaho.
Habitat: Dry, open, typically rocky areas, often with sagebrush.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Northern daisy (Erigeron nivalis)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Rocky soil areas from middle elevations in the mountains to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Biennial, Perennial

Shasta daisy (Leucanthemum ×superbum)
Distribution: Occurring in lowlands in western Washington; British Columbia to Oregon, also in eastern North America.
Habitat: Disturbed areas where often escaped from cultivation.
Origin: Introduced
Flowers: May-August
Growth Duration: Perennial

Showy Townsend daisy (Townsendia florifera)
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon and Nevada, east to Montana, Wyoming, and Utah.
Habitat: Dry-open places in the plains and foothills, often with sagebrush.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Alpine dandelion (Taraxacum scopulorum)
Distribution: Likely restricted to the North Cascades in Washington; British Columbia to Washington, east to Alberta, Montana, Idaho, Utah, Wyoming, and Colorado,
Habitat: Rocky sites in the alpine.
Flowers: June-September
Growth Duration: Perennial

Dwarf alpine dandelion (Taraxacum alaskanum)
Distribution: Occuring only in North Cascades in Washington; Alaska to Washington, also in Russian Far East.
Habitat: Rocky, exposed areas in alpine habitatas.
Origin: Native
Flowers: July-September
Growth Duration: Perennial

Red-seeded dandelion (Taraxacum erythrospermum)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast.
Habitat: Meadows, grasslands, prairies, and other open areas, typically where some level of disturbance present.
Origin: Introduced from Eurasia
Flowers: April-October
Growth Duration: Perennial

Darnel (Lolium temulentum)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Yukon Territory to California, east across North America to the Atlantic.
Habitat: Disturbed ground, pastures, and roadsides.
Origin: Introduced from the Mediterranean
Flowers: May-June
Growth Duration: Annual

Cutleaf dead-nettle (Lamium hybridum)
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in southern and eastern North America.
Habitat: Field, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Annual

Yellow dead-nettle (Lamium galeobdolon)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also in eastern North America.
Habitat: Lowland forest understory, often where disturbed.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial

Meadow death-camas (Toxicoscordion venenosum)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Grasslands, balds, prairies, and ponderosa pine forest openings, from the coast to middle elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Deeproot (Iva axillaris)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Dry, often alkaline places, in the valleys, plains and foothills.
Origin: Native
Flowers: May-September
Growth Duration: Perennial

Deer's tongue (Erythronium oregonum)
Distribution: Occurring west of the Cascades crest in the Puget Sound lowlands and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Prairies, rocky balds, moist woods; at low elevations.
Origin: Native
Flowers: March-May
Growth Duration: Perennial

Deer's-foot (Achlys triphylla)
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

Deerbrush (Ceanothus integerrimus)
Distribution: Occurring east of the Cascades crest in south-central Washington; south-central Washington to California.
Habitat: Dry, open forests and open areas at low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Meadow deervetch (Hosackia pinnata)
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington, but also in far eastern Washington; southwestern British Columbia to California, also in western Idaho.
Habitat: Moist areas and wetlands, lowland to montane.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Bradshaw's desert-parsley (Lomatium bradshawii)
Distribution: Occurring west of the Cascades crest in Clark County in Washington; southwestern Washington to the Willamette Valley near Eugene, Oregon.
Habitat: Wet meadows at low elevations.
Origin: Native
Flowers: May-June
Growth Duration: Perennial

Butterfly bearing desert-parsley (Lomatium papilioniferum)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Idaho and Nevada.
Habitat: Sagebrush desert and open slopes at low to moderate elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Cascade desert-parsley (Lomatium martindalei)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to northern California.
Habitat: Dry meadows and rocky outcroppings from middle elevations to the alpine.
Origin: Native
Flowers: May-September
Growth Duration: Perennial

Cous-root desert-parsley (Lomatium cous)
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to northeast Nevada, east to Montana and Wyoming.
Habitat: Dry, open, often rocky places often with sagebrush; common at low elevations, occasionally found at higher elevations.
Origin: Native
Flowers: April-July
Growth Duration: Perennial

Fern-leaved desert-parsley (Lomatium multifidum)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Open, often rocky slopes and dry meadows, lowlands to low alpine areas.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Gorman's desert-parsley (Lomatium gormanii)
Distribution: Occurring east of the Cascades crest in Washington; Washington to Oregon, east to Idaho.
Habitat: Open slopes and scablands in the foothills, valleys and plains, often with sagebrush.
Origin: Native
Flowers: December-May
Growth Duration: Perennial

Hoover's lomatium (Lomatium tuberosum)
Distribution: Occurring east of the Cascades crest in central Washington, where endemic to Benton, Grant, Kittitas, and Yakima counties. Scattered locations in Yakima County, Washington, and adjacent counties.
Habitat: Rocky slopes and talus fields at middle elevations .
Origin: Native
Flowers: March-April
Growth Duration: Perennial

Knoke's desert-parsley (Lomatium knokei)
Distribution: Occurring east of the Cascades crest, where endemic to Kittitas County.
Habitat: Open, vernally wet, gently sloping meadows of fine-textured clay soils at approximately 1200 meters.
Origin: Native
Flowers: May-June
Growth Duration: Perennial

Linear-leaved desert-parsley (Lomatium linearifolium)
Distribution: Occurring east of the Cascades crest in Washington; central Washington to north-central Oregon, east to Montana and Wyoming.
Habitat: Open slopes and ridges, from low to middle elevations.
Origin: Native
Flowers: March-May
Growth Duration: Perennial

Piper's desert-parsley (Lomatium piperi)
Distribution: Occurring east of the Cascades crest in Washington; central Washington to northern California.
Habitat: Sagebrush desert to ponderosa pine forest openings.
Origin: Native
Flowers: February-June
Growth Duration: Perennial

Ribseed desert-parsley (Lomatium tamanitchii)
Distribution: Occurring east of the Cascades crest at the east end of the Columbia River Gorge in Washington, where endemic to Klickitat County.
Habitat: Open slopes and valleys, typically in clay-rich, silicic volcanic ash-derived soils at low elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial

Rone's desert-parsley (Lomatium roneorum)
Distribution: Occurring east of the Cascades crest, where endemic to Chelan County.
Habitat: Open, rocky slopes in Ponderosa pine forest openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Sandberg's desert-parsley (Lomatium sandbergii)
Distribution: Occurring east of the Cascades crest in northeastern Washington; southeastern British Columbia to northeastern Washington, east to southeastern Alberta and northwestern Montana.
Habitat: Rocky slopes and ridges at middle elevations.
Origin: Native
Flowers: May-June
Growth Duration: Perennial

Slickrock desert-parsley (Lomatium laevigatum)
Distribution: Occurring east of the Cascades crest in south-central Washington; south-central Washington to adjacent Oregon.
Habitat: Crevices is basalt cliffs.
Origin: Native
Flowers: April
Growth Duration: Perennial

Stream bank desert-parsley (Lomatium ambiguum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to northeast Oregon, east to southeastern Alberta, western Montana, and Wyoming.
Habitat: Open, often rocky slopes and flats, from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Biennial, Perennial

Swale desert-parsley (Lomatium ambiguum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to northeast Oregon, east to southeastern Alberta, western Montana, and Wyoming.
Habitat: Open, often rocky slopes and flats, from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Biennial, Perennial

Umptanum desert-parsley (Lomatium quintuplex)
Distribution: Occurring east of the Cascades crest in central Washington, where endemic to eastern Kittitas County and northeastern Yakima County.
Habitat: Generally in lithosol areas in sagebrush desert.
Origin: Native
Flowers: March-May
Growth Duration: Perennial

Wenatchee desert-parsley (Lomatium cuspidatum)
Distribution: Occurring east of the Cascades crest, where endemic to the Wenatchee Mountains of Chelan and Kittitas counties in Washington.
Habitat: Open, rocky slopes, often on serpentine, from middle elevations to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Flax-flower desert-trumpets (Leptosiphon liniflorus)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California.
Habitat: open, dry areas in sagebrush flats to Ponderosa pine forests.
Origin: Native
Flowers: April-June.
Growth Duration: Annual

Northern desert-trumpets (Leptosiphon septentrionalis)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to northern Rocky Mountains and Great Plains.
Habitat: In seasonally wet open plains and slopes from low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Annual

Devil's-club (Oplopanax horridus)
Distribution: Widely distributed throughout the forested areas on both sides of the Cascades crest in Washington; Alaska to Oregon, east to Alberta and Montana, also in the Great Lakes region.
Habitat: Moist woods at mid-elevations, especially along streams.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Dewberry (Rubus ursinus)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Montana.
Habitat: Open to fairly dense woodlands, thickets, and balds, sea level to middle elevations in the mountains; common in logged areas.
Origin: Native
Flowers: April-August
Growth Duration: Perennial

Snow dewberry (Rubus nivalis)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to southwest Oregon, also in west-central Idaho.
Habitat: Open to deeply shaded, usually moist areas in the mountains at middle elevations.
Origin: Native
Flowers: June-July
Growth Duration: Perennial

Beaked ditch-grass (Ruppia maritima)
Distribution: Occurring along the coast and east of the Cascades crest in Washington, where saline; Alaska to California, inland throughout Canada and the United States to the Atlantic Coast.
Habitat: Coastal in saline or brackish water, inland in ponds, ditches, and lakes.
Origin: Native
Flowers: July - August
Growth Duration: Perennial

Spiral ditch-grass (Ruppia maritima)
Distribution: Occurring along the coast and east of the Cascades crest in Washington, where saline; Alaska to California, inland throughout Canada and the United States to the Atlantic Coast.
Habitat: Coastal in saline or brackish water, inland in ponds, ditches, and lakes.
Origin: Native
Flowers: July - August
Growth Duration: Perennial

Dittander (Lepidium latifolium)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Great Plains and eastern North America.
Habitat: Disturbed, moist areas, irrigated land, stream banks, and drier upland areas.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial

Clustered dock (Rumex conglomeratus)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, east to Nevada and Arizona; also in eastern North America.
Habitat: A weed of waste ground.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial

Fleshy willow dock (Rumex crassus)
Distribution: Occurring west of the Cascades crest along the outer coast in Washington; Washington to California.
Habitat: Coastal dunes, sandy shores, and marshes
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Narrow-leaved dock (Rumex stenophyllus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming, scattered eastward to the eastern U.S.
Habitat: Dune swales, marshes, shores, fens, and ditches.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial

Patience dock (Rumex patientia)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to the Atlantic Coast.
Habitat: Roadsides and other disturbed, open ground
Origin: Introduced from Eurasia
Flowers: May-August
Growth Duration: Perennial

Seashore dock (Rumex persicarioides)
Distribution: Occurring west of the Cascades crest along the coast in Washington; British Columbia to California, also in eastern North America.
Habitat: Beaches, shores, and slightly saline marshes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Sour dock (Rumex crispus)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Meadows, fields, roadsides, wastelots, and other disturbed, open areas.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Biennial, Perennial

Veiny dock (Rumex venosus)
Distribution: Occurring east of the Cascades crest in Washington; Alberta to California, east to the Rocky Mountains and Great Plains.
Habitat: Sand dunes and sandy river banks to dry, gravelly soil, sagebrush deserts and grasslands at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Willow dock (Rumex salicifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast
Habitat: Streambanks, moist meadows, beaches, alkaline shores, roadsides, and other open places from low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Yellow dock (Rumex persicarioides)
Distribution: Occurring west of the Cascades crest along the coast in Washington; British Columbia to California, also in eastern North America.
Habitat: Beaches, shores, and slightly saline marshes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Buttonbush dodder (Cuscuta cephalanthi)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Tideflat and floodplains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial

Chaparral dodder (Cuscuta californica)
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington to California, east to Utah and Arizona.
Habitat: Drying shores, grassy slopes.
Origin: Native
Flowers: June-August
Growth Duration: Annual

Common dodder (Cuscuta epithymum)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, east across the northern U.S. to northeastern North America.
Habitat: Parasitic on Asteraceae, Fabaceae, Poaceae, Rosaceae, etc.; dunes, floodplains, meadows, and roadsides.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Annual

Field dodder (Cuscuta campestris)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east to Utah and Texas; also in eastern North America.
Habitat: Shores, floodplains, roadsides, ditches, fields, and other disturbed areas.
Origin: Native
Flowers: June-September
Growth Duration: Annual

Inelegant dodder (Cuscuta indecora)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Atlantic Coast.
Habitat: Parasitic on alfalfa, Amaranthaceae, Asteraceae, and Polygonaceae, etc.; floodplains, sandbars, and shores.
Origin: Native
Flowers: July-September
Growth Duration: Annual

Mountain dodder (Cuscuta suksdorfii)
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California.
Habitat: Parasitic on Asteraceae and Fabaceae, occasionally other families; montane pond shores, floodplains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial

Thyme dodder (Cuscuta epithymum)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, east across the northern U.S. to northeastern North America.
Habitat: Parasitic on Asteraceae, Fabaceae, Poaceae, Rosaceae, etc.; dunes, floodplains, meadows, and roadsides.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Annual

Clasping-leaved dogbane (Apocynum cannabinum)
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

Flytrap dogbane (Apocynum androsaemifolium)
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

Spreading dogbane (Apocynum androsaemifolium)
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

Dogfennel (Anthemis cotula)
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

Creek dogwood (Cornus occidentalis)
Distribution: Occurring on both sides of the Cascades crest in Washington, through more common west of the crest; Alaska to California, east to Idaho, western Montana, and Nevada.
Habitat: Moist soil, especially along streams, from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Nuttall's dogwood (Cornus nuttallii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Idaho.
Habitat: Open to rather dense damp forests, often along streams.
Origin: Native
Flowers: April-June
Growth Duration: Perennial

Red-osier dogwood (Cornus stolonifera)
Distribution: Widely distributed on both sides of the Cascades crest in Washington, though more common east of the crest; Alaska to California, east to the Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist soil, especially along streams, from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Douglas-fir (Pseudotsuga menziesii)
Distribution: Widely distributed in forested areas on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta and Colorado.
Habitat: Moist to dry areas from sea level to mid-elevations in the mountains, occasionally to timberline.
Origin: Native
Cones: April-May
Growth Duration: Perennial

Smooth douglasia (Androsace laevigata)
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

Doveweed (Croton setigerus)
Distribution: Occurring east of the Cascades crest in Washington; Washington to Baja California, east to western Idaho and Nevada.
Habitat: Dry, often sandy or rocky areas.
Origin: Native
Flowers: June-August
Growth Duration: Annual

Showy downingia (Downingia pulcherrima)
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; central Washington to northern California.
Habitat: Edge of lakes, ponds, vernal pools, and ditches.
Origin: Native
Flowers: May-June
Growth Duration: Annual

Alaska draba (Draba albertina)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Montane forest openings to alpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Annual, Biennial, Perennial

Golden draba (Draba aurea)
Distribution: Occurring east of the Cascades crest in north-central Washington; Alaska to north-central Washington, east to the Rocky Mountains; Greenland.
Habitat: Montane forest to alpine ridges or meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Lancefruit draba (Draba lonchocarpa)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Northwest Territories, south in Rocky mountains to Colorado.
Habitat: Alpine slopes, talus, and rocky outcroppings.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Payson's draba (Draba novolympica)
Distribution: Occurring in the Olympics and Cascades mountains of Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Open slopes, talus ridges, and other exposed areas in the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Taylor's draba (Draba taylorii)
Distribution: Occurring along and east of the Cascades crest in Washington; British Columbia to Washington.
Habitat: Rock crevices, ledges, and benches in the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Thompson's draba (Draba thompsonii)
Distribution: Occurring on both sides of the Cascades crest in northern Washington; southern British Columbia to central Washington, disjunct in Yukon Territory.
Habitat: Subalpine to alpine talus slopes and rock crevices.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

American dragonhead (Dracocephalum parviflorum)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon and Nevada, east to the Rocky Mountains; also in eastern North America.
Habitat: Open, often moist places at low to middle elevations.
Origin: Native
Flowers: June-August
Growth Duration: Annual, Biennial, Perennial

Western false dragonhead (Physostegia parviflora)
Distribution: Occurring east of the Cascades crest and along the Columbia River in Washington; British Columbia to Oregon, east to the Rocky Mountains, Great Plains, and the central U.S.
Habitat: Shores of strams and lakes, marshes, and other low, wet places in the valleys and foothills.
Origin: Native
Flowers: July-September
Growth Duration: Perennial

Composite dropseed (Sporobolus compositus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across North America to the Atlantic Coast.
Origin: Native
Flowers: August-September
Growth Duration: Perennial

Sand dropseed (Sporobolus cryptandrus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to southern California, east across most of North America to the Atlantic Coast except in the extreme southeastern U.S.
Habitat: Sagebrush desert, especilly where sandy, to the foothills and grassland.
Origin: Native
Flowers: June-September
Growth Duration: Perennial

Tall dropseed (Sporobolus compositus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across North America to the Atlantic Coast.
Origin: Native
Flowers: August-September
Growth Duration: Perennial

Cordilleran drymocallis (Drymocallis arguta)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, Nevada, and Arizona, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Dry to vernally moist meadows, grasslands, shrub-steppe, open forest, and rocky slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial

Common duckmeal (Spirodela polyrhiza)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Quiet water, ponds, marshes and slow-moving streams
Origin: Native
Flowers: July-September
Growth Duration: Perennial

Common duckweed (Lemna minor)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast; cosmopolitan.
Habitat: In standing or slow-moving fresh water
Origin: Native
Flowers: June - October
Growth Duration: Perennial

Ivy duckweed (Lemna trisulca)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast; cosmopolitan.
Habitat: Quiet streams and standing fresh water.
Origin: Native
Flowers: July-September
Growth Duration: Perennial

Least duckweed (Lemna minuta)
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; southwestern British Columbia to California, east across the U.S. in scattered locations to the Atlantic Coast.
Habitat: Floating on surface of calm water or on face of vertical rock seeps.
Origin: Native
Flowers: June-September
Growth Duration: Perennial

Star duckweed (Lemna trisulca)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across much of North America to the Atlantic Coast; cosmopolitan.
Habitat: Quiet streams and standing fresh water.
Origin: Native
Flowers: July-September
Growth Duration: Perennial

American dunegrass (Leymus mollis)
Distribution: Occurring west of the Cascades crest in Washington along the immediate marine coastline; Alaska to California, east across Canada to the Great Lakes region and northeastern North America.
Habitat: Coastal sand dunes, marshes, and headlands, where tolerant of salt water.
Origin: Native
Flowers: June-August
Growth Duration: Perennial

Douglas-fir dwarf mistletoe (Arceuthobium douglasii)
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 (Arceuthobium laricis)
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

Western dwarf mistletoe (Arceuthobium campylopodum)
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

Cliff dwarf-primrose (Androsace laevigata)
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

Yellow dye (Reseda luteola)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California; scattered locations in central and eastern North America.
Habitat: Disturbed ground at low elevations.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Biennial