Vascular Plants
Includes all flowering plants, conifers, ferns and fern-allies.
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Scientific names beginning with H:
52 genera
117 species, 45 subspecies and varieties
117 species, 45 subspecies and varieties
Show only taxa with photos
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Index to genera:
Hackelia, Halerpestes, Halogeton, Harrimanella, Hedera, Hedysarum, Helenium, Helianthella, Helianthus, Heliotropium, Helleborus, Hemerocallis, Hemieva, Hemitomes, Hemizonella, Heracleum, Herniaria, Hesperis, Hesperochiron, Hesperostipa, Heteranthera, Heterocodon, Heterotheca, Heuchera, Hibiscus, Hieracium, Hierochloe, Hippuris, Hirschfeldia, Holcus, Holodiscus, Holosteum, Honckenya, Hordeum, Horkelia, Hornungia, Hosackia, Howellia, Hulsea, Humulus, Huperzia, Hyacinthoides, Hydrilla, Hydrocharis, Hydrocotyle, Hydrophyllum, Hymenopappus, Hymenophyllum, Hyoscyamus, Hypericum, Hypochaeris, HyssopusHackelia americana – nodding stickseed
Distribution: Occurring east of the Cascades crest in north-central and northeastern Washington; circumboreal, south to northern Washington, east across northern Rocky Mountains and northern Great Plains to northeastern North America.
Habitat: Thickets and open woodland.
Origin: Native
Flowers: June-August
Growth Duration: Annual, Biennial
Distribution: Occurring east of the Cascades crest in north-central and northeastern Washington; circumboreal, south to northern Washington, east across northern Rocky Mountains and northern Great Plains to northeastern North America.
Habitat: Thickets and open woodland.
Origin: Native
Flowers: June-August
Growth Duration: Annual, Biennial
Hackelia ciliata – Okanogan stickseed
Distribution: Occurring east of the Cascades crest in eastern Washington; south-central British Columbia to eastern Washington, possibly northwestern Idaho.
Habitat: Dry, open slopes and flats in areas with sagebrush or ponderosa pine.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in eastern Washington; south-central British Columbia to eastern Washington, possibly northwestern Idaho.
Habitat: Dry, open slopes and flats in areas with sagebrush or ponderosa pine.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Hackelia cinerea – gray stickseed
Distribution: Occurring east of the Cascades crest in central and eastern Washington; central Washington to Idaho and Montana.
Habitat: Open or lightly forested areas, especially on talus or cliffs, and loose stream banks, in valleys and foothills to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in central and eastern Washington; central Washington to Idaho and Montana.
Habitat: Open or lightly forested areas, especially on talus or cliffs, and loose stream banks, in valleys and foothills to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Hackelia diffusa – diffuse stickseed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Cliffs and talus slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Cliffs and talus slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
• var. arida – sagebrush stickseed, steppe stickseed
• var. cottonii – Cotton's stickseed
• var. diffusa – diffuse stickseed
Hackelia floribunda – many-flowered stickseed
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Thickets, meadows, stream banks and other moist places, from low elevations to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Biennial, Perennial
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Thickets, meadows, stream banks and other moist places, from low elevations to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Biennial, Perennial
Hackelia hispida – hispid stickseed, rough stickseed
Distribution: Occurring east of the Cascades crest in central and southeastern Washington; central Washington, and southeastern Washington, northeastern Oregon, and adjacent western Idaho.
Habitat: Cliffs and talus slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in central and southeastern Washington; central Washington, and southeastern Washington, northeastern Oregon, and adjacent western Idaho.
Habitat: Cliffs and talus slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
• var. disjuncta – sagebrush stickseed
• var. hispida – rough stickseed
Hackelia micrantha – meadow forget-me-not, blue stickseed
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist, open hillsides seasonally wet forest openings, and riparian corridors from montane to subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist, open hillsides seasonally wet forest openings, and riparian corridors from montane to subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hackelia taylorii – Taylor's stickseed
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan County.
Habitat: Dry, open slopes, often in talus, at middle to high elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan County.
Habitat: Dry, open slopes, often in talus, at middle to high elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Hackelia venusta – lesser showy stickseed
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan County.
Habitat: Rocky slopes with ponderosa pine, at about 1000 feet elevation.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan County.
Habitat: Rocky slopes with ponderosa pine, at about 1000 feet elevation.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Halerpestes cymbalaria – alkali buttercup, seaside buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Great Plains, Great Lakes, and northeastern North America.
Habitat: Ditches, marshes and muddy meadowlands, often where saline or alkaline.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Great Plains, Great Lakes, and northeastern North America.
Habitat: Ditches, marshes and muddy meadowlands, often where saline or alkaline.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Halogeton glomeratus – halogeton, saltlover
Origin: Introduced from Eurasia
Flowers: July - September
Growth Duration: Annual
Origin: Introduced from Eurasia
Flowers: July - September
Growth Duration: Annual
Harrimanella stelleriana – Alaska bell-heather, Alaska bellheather, alpine heather, Alaskan moss-heather, Alaskan mountain-heather
Distribution: Alaska to the high Cascades of Washington
Habitat: Rocky slopes and seeps, alpine to subalpine
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Distribution: Alaska to the high Cascades of Washington
Habitat: Rocky slopes and seeps, alpine to subalpine
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Hedera helix – common ivy, English ivy
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, widespread elsewhere in North America.
Habitat: Wooded areas at low elevations.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, widespread elsewhere in North America.
Habitat: Wooded areas at low elevations.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Hedera hibernica – Atlantic ivy
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to California, east in the Columbia River Gorge.
Habitat: Lowland forest, often where disturbed.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to California, east in the Columbia River Gorge.
Habitat: Lowland forest, often where disturbed.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Hedysarum occidentale – western sweet-vetch
Distribution: Occurring in the Olympic Mountains in Washington; British Columbia to Washington, Idaho and Utah, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Alpine and subalpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring in the Olympic Mountains in Washington; British Columbia to Washington, Idaho and Utah, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Alpine and subalpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
• var. occidentale – western sweet-vetch
Hedysarum sulphurescens – yellow sweet-vetch
Distribution: Occurring east of the Cascades crest in north-central and northeastern Washington; British Columbia to Washington, east to Alberta, Montana, and Wyoming, also reported from northeastern Oregon.
Habitat: Open forested areas.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in north-central and northeastern Washington; British Columbia to Washington, east to Alberta, Montana, and Wyoming, also reported from northeastern Oregon.
Habitat: Open forested areas.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Helenium autumnale – common sneezeweed, large flowered sneezeweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Stream banks and other moist, low ground generally at low elevations.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Stream banks and other moist, low ground generally at low elevations.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Helianthella uniflora – Rocky Mountain helianthella
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon and Nevada, east to the Rocky Mountains.
Habitat: Dry, open woods and meadows from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon and Nevada, east to the Rocky Mountains.
Habitat: Dry, open woods and meadows from low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
• var. douglasii – Douglas helianthella, false sunflower
Helianthus annuus – common sunflower
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other open areas, often where disturbed, at low to middle elevations.
Origin: Native and introduced populations in Washington
Flowers: June-September
Growth Duration: Annual
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Fields, roadsides, wastelots, and other open areas, often where disturbed, at low to middle elevations.
Origin: Native and introduced populations in Washington
Flowers: June-September
Growth Duration: Annual
Helianthus ciliaris – blueweed
Distribution: Known historically from east of the Cascades crest in Yakima County, where presumably eliminated by herbicide treatment due to it being a noxious weed; California, east across the southwestern U.S. to the southern Great Plains and Illinois.
Habitat: Disturbed, open ground in sagebrush.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Distribution: Known historically from east of the Cascades crest in Yakima County, where presumably eliminated by herbicide treatment due to it being a noxious weed; California, east across the southwestern U.S. to the southern Great Plains and Illinois.
Habitat: Disturbed, open ground in sagebrush.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Helianthus cusickii – Cusick's sunflower, turniproot sunflower
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho and Nevada.
Habitat: Sagebrush, grasslands, dry slopes, and other open areas at low to middle elevations.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho and Nevada.
Habitat: Sagebrush, grasslands, dry slopes, and other open areas at low to middle elevations.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Helianthus nuttallii – Nuttall's sunflower
Distribution: Chiefly east of the Cascades: Western and Mid-western United States and adjacent Canada
Habitat: Meadows and other moist places, low to moderate elevations in the mountains
Origin: Native
Flowers: July - September
Growth Duration: Perennial
Distribution: Chiefly east of the Cascades: Western and Mid-western United States and adjacent Canada
Habitat: Meadows and other moist places, low to moderate elevations in the mountains
Origin: Native
Flowers: July - September
Growth Duration: Perennial
• ssp. nuttallii – cordilleran sunflower, Nuttall's sunflower
Helianthus petiolaris – prairie sunflower
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Atlantic Coast.
Habitat: Dry, open areas, often where disturbed.
Origin: Introduced from the Great Plains
Flowers: June-September
Growth Duration: Annual
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Atlantic Coast.
Habitat: Dry, open areas, often where disturbed.
Origin: Introduced from the Great Plains
Flowers: June-September
Growth Duration: Annual
• ssp. petiolaris – prairie sunflower
Helianthus tuberosus – Jerusalem artichoke
Distribution: Occurring in scattered locations chiefly east of the Cascades crest in Washington; .Washington, east to the Rocky Mountains, native from the Great Plains to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed areas, where escaping from cultivation.
Origin: Introduced from central and eastern North America
Flowers: August-October
Growth Duration: Perennial
Distribution: Occurring in scattered locations chiefly east of the Cascades crest in Washington; .Washington, east to the Rocky Mountains, native from the Great Plains to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed areas, where escaping from cultivation.
Origin: Introduced from central and eastern North America
Flowers: August-October
Growth Duration: Perennial
Heliotropium curassavicum – salt heliotrope, seaside heliotrope
Distribution: East of the Cascades in Washington; British Columbia south to tropical America.
Habitat: Saline places at low evelevations, often in the beds of dried ponds.
Origin: Native
Flowers: June-September
Growth Duration: Annual, Perennial
Distribution: East of the Cascades in Washington; British Columbia south to tropical America.
Habitat: Saline places at low evelevations, often in the beds of dried ponds.
Origin: Native
Flowers: June-September
Growth Duration: Annual, Perennial
Helleborus foetidus – stinking hellebore
Distribution: Currently only known from lowland western Washington.
Habitat: Disturbed sites near urban or suburban areas, where escaped from cultivation.
Origin: Introduced
Flowers: February-April
Growth Duration: Perennial
Distribution: Currently only known from lowland western Washington.
Habitat: Disturbed sites near urban or suburban areas, where escaped from cultivation.
Origin: Introduced
Flowers: February-April
Growth Duration: Perennial
Hemieva ranunculifolia – buttercup-leaf mock brookfoam
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Montana.
Habitat: Foothills to subalpine slopes, on wet, mossy rocks, often where dry by mid-summer.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Montana.
Habitat: Foothills to subalpine slopes, on wet, mossy rocks, often where dry by mid-summer.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Hemitomes congestum – coneplant, gnome-plant
Distribution: West of the Cascades in Washington; Vancouver Island and mainland British Columbia south to Monterey County, California.
Habitat: Rich humus in damp coniferous forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: West of the Cascades in Washington; Vancouver Island and mainland British Columbia south to Monterey County, California.
Habitat: Rich humus in damp coniferous forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hemizonella minima – smallhead tarplant, least tarweed, small-head tarweed, smallhead tarweed
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to California, east to Montana and Nevada.
Habitat: Dry, open areas in sagebrush, grasslands, and ponderosa pine forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to California, east to Montana and Nevada.
Habitat: Dry, open areas in sagebrush, grasslands, and ponderosa pine forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Heracleum mantegazzianum – giant hogweed
Distribution: Occurring west of the Cascades crest in the Puget Trough lowlands in Washington; southwestern British Columbia to Oregon, also in eastern North America.
Habitat: Disturbed areas often associated with residential development; Class A noxious weed.
Origin: Introduced from Eurasia
Flowers: June-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in the Puget Trough lowlands in Washington; southwestern British Columbia to Oregon, also in eastern North America.
Habitat: Disturbed areas often associated with residential development; Class A noxious weed.
Origin: Introduced from Eurasia
Flowers: June-July
Growth Duration: Perennial
Heracleum maximum – American cow-parsnip, American hogweed
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America except in the southeastern U.S.
Habitat: Moist areas, including meadows and forest edge from low to middle elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America except in the southeastern U.S.
Habitat: Moist areas, including meadows and forest edge from low to middle elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Herniaria hirsuta – hairy rupturewort
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to California and Arizona, also in scattered locations in eastern North America.
Habitat: Disturbed sandy flats, roadsides, and woodlands at low elevation.
Origin: Introduced from Eurasia and northern Africa
Flowers: May-July
Growth Duration: Annual
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to California and Arizona, also in scattered locations in eastern North America.
Habitat: Disturbed sandy flats, roadsides, and woodlands at low elevation.
Origin: Introduced from Eurasia and northern Africa
Flowers: May-July
Growth Duration: Annual
• var. cinerea – hairy rupturewort
Hesperis matronalis – mother-of-the-evening, dame's rocket
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: Roadsides, disturbed forest edge, wastelots, and other disturbed areas where escaping from cultivation.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Biennial, Perennial
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: Roadsides, disturbed forest edge, wastelots, and other disturbed areas where escaping from cultivation.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Biennial, Perennial
Hesperochiron californicus – California hesperochiron, California monkey-fiddle
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to western Montana, Wyoming, and Utah.
Habitat: Mostly in more or less alkaline meadows and flats, in plains, foothills and valleys.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to western Montana, Wyoming, and Utah.
Habitat: Mostly in more or less alkaline meadows and flats, in plains, foothills and valleys.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Hesperochiron pumilus – small hesperochiron, small monkey-fiddle
Distribution: Occurring east of the Cascade crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Meadows and moist, open slopes from the foothills to moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Distribution: Occurring east of the Cascade crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Meadows and moist, open slopes from the foothills to moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Hesperostipa comata – needle-and-thread
Distribution: British Columbia south on the east side of the Cascades to California, east to Ontario and Texas.
Habitat: Plains and prairies to forested areas in the mountains.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
Distribution: British Columbia south on the east side of the Cascades to California, east to Ontario and Texas.
Habitat: Plains and prairies to forested areas in the mountains.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
• ssp. comata – needle and thread
• ssp. intermedia – Tweedy's needlegrass
Heteranthera dubia – grassleaf mud-plantain, water stargrass, yellow stargrass
Distribution: Occurring chiefly east of the Cascades crest along major rivers in Washington, however particularly common and rather invasives in lower Yakima River; British Columbia to California, widespread in eastern North America.
Habitat: River backwaters, slow-moving rivers, quiet streams, ponds and lakes.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Distribution: Occurring chiefly east of the Cascades crest along major rivers in Washington, however particularly common and rather invasives in lower Yakima River; British Columbia to California, widespread in eastern North America.
Habitat: River backwaters, slow-moving rivers, quiet streams, ponds and lakes.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Heterocodon rariflorus – western pearlflower
Distribution: East of the Cascades in Washington; southern British Columbia south to California, east to Idaho and Nevada.
Habitat: Moist, open places in the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Distribution: East of the Cascades in Washington; southern British Columbia south to California, east to Idaho and Nevada.
Habitat: Moist, open places in the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Heterotheca oregona – Oregon goldenaster
Distribution: British Columbia to California, east base of the Cascades to the coast.
Habitat: Sand and gravel bars along rivers, low to moderate elevations.
Origin: Native
Flowers: June-Sept.
Growth Duration: Perennial
Distribution: British Columbia to California, east base of the Cascades to the coast.
Habitat: Sand and gravel bars along rivers, low to moderate elevations.
Origin: Native
Flowers: June-Sept.
Growth Duration: Perennial
Heterotheca villosa – hairy goldaster
Distribution: Widespread in Washington and Oregon, chiefly east of the Cascades; east to Michigan
Habitat: Open, sunny areas, often in sandy soil, low to moderate elevations
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Widespread in Washington and Oregon, chiefly east of the Cascades; east to Michigan
Habitat: Open, sunny areas, often in sandy soil, low to moderate elevations
Origin: Native
Flowers: June-September
Growth Duration: Perennial
• var. foliosa – leafy goldenaster
• var. minor – hairy goldenaster, hispid goldenaster
• var. villosa – hairy goldaster, hairy goldenaster
Heuchera chlorantha – green-flowered alumroot, meadow alumroot, tall alumroot
Distribution: West of the Cascade summit, Queen Charlotte Island, British Columbia south to Douglas County, Oregon, up the Columbia River Gorge to the east base of the Cascades, then south along the Oregon Cascades to Klamath County, OR.
Habitat: Gravelly prairies and wooded hillsides.
Origin: Native
Flowers: May - August
Growth Duration: Perennial
Distribution: West of the Cascade summit, Queen Charlotte Island, British Columbia south to Douglas County, Oregon, up the Columbia River Gorge to the east base of the Cascades, then south along the Oregon Cascades to Klamath County, OR.
Habitat: Gravelly prairies and wooded hillsides.
Origin: Native
Flowers: May - August
Growth Duration: Perennial
Heuchera cylindrica – lava alumroot, poker alumroot, roundleaf alumroot
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Nevada.
Habitat: Rocky soil, cliffs and talus slopes, foothills to the subalpine.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Nevada.
Habitat: Rocky soil, cliffs and talus slopes, foothills to the subalpine.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Heuchera glabra – alpine alumroot, smooth alumroot
Distribution: In the Cascades, Olympics, and Selkirks and m ountains in Washington; Alaska south to Mt. Hood, Oregon.
Habitat: Streambanks and moist rocks, from the coast to above timberline
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: In the Cascades, Olympics, and Selkirks and m ountains in Washington; Alaska south to Mt. Hood, Oregon.
Habitat: Streambanks and moist rocks, from the coast to above timberline
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Heuchera grossulariifolia – gooseberry-leaved alumroot
Distribution: Occurring east of the Cascades crest in the Columbia River Gorge in south-central Washington; Columbia River Gorge to Nevada, east to Idaho and western Montana.
Habitat: Grassy canyons and rocky canyon walls to alpine scree and talus slopes.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in the Columbia River Gorge in south-central Washington; Columbia River Gorge to Nevada, east to Idaho and western Montana.
Habitat: Grassy canyons and rocky canyon walls to alpine scree and talus slopes.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
• var. grossulariifolia – gooseberry-leaved alumroot
• var. tenuifolia – gooseberry-leaved alumroot
Heuchera micrantha – crevice alumroot, small-flowered alumroot
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Gravelly stream banks, rock crevices and talus slopes, sea level to subalpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Gravelly stream banks, rock crevices and talus slopes, sea level to subalpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
• var. diversifolia – small-flowered alumroot
• var. hartwegii – Hartweg's small-flowered alumroot
• var. micrantha – small-flowered alumroot
Hieracium albiflorum – white hawkweed, white-flowered hawkweed
Distribution: Widely distributed in forested areas on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Open woods from low to middle elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Widely distributed in forested areas on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Open woods from low to middle elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Hieracium aurantiacum – orange hawkweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across southern Canada and northern U.S; widely distributed throughout eastern U.S.
Habitat: Roadsides, fields, meadows, pastures, forest edge, wastelots, and other disturbed areas at low to middle elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across southern Canada and northern U.S; widely distributed throughout eastern U.S.
Habitat: Roadsides, fields, meadows, pastures, forest edge, wastelots, and other disturbed areas at low to middle elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium caespitosum – meadow hawkweed, yellow king devil
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, Montana, and Wyoming; also occurring throughout eastern North America.
Habitat: Moist pastures, forest openings, roadsides, and springs, from the lowlands to middle elevations in the mountains, usually where disturbed.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho, Montana, and Wyoming; also occurring throughout eastern North America.
Habitat: Moist pastures, forest openings, roadsides, and springs, from the lowlands to middle elevations in the mountains, usually where disturbed.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium flagellare – whip hawkweed
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Washington, east to Idaho; also in eastern North America.
Habitat: Roadsides, dry meadows, railroads, and other disturbed, open areas at low elevations.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Washington, east to Idaho; also in eastern North America.
Habitat: Roadsides, dry meadows, railroads, and other disturbed, open areas at low elevations.
Origin: Introduced from Europe
Flowers: May-September
Growth Duration: Perennial
Hieracium ×floribundum – flowery hawkweed
Distribution: Occurring in scattered locations in lowland western Washington; Washington east to Montana and Wyoming; eastern North America.
Habitat: Disturbed areas at low elevations.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring in scattered locations in lowland western Washington; Washington east to Montana and Wyoming; eastern North America.
Habitat: Disturbed areas at low elevations.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
Hieracium glomeratum – yellow devil hawkweed
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to Washington.
Habitat: Open forest, meadows, disturbed ground, roadsides, stream banks, and gravel pits generally at low elevations.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to Washington.
Habitat: Open forest, meadows, disturbed ground, roadsides, stream banks, and gravel pits generally at low elevations.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Perennial
Hieracium lachenalii – common hawkweed, English hawkweed, European hawkweed
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to northern Oregon; also in eastern North America.
Habitat: Open forest, fields, shores, wastelots, and other disturbed areas generally at low to middle elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to northern Oregon; also in eastern North America.
Habitat: Open forest, fields, shores, wastelots, and other disturbed areas generally at low to middle elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium longiberbe – long-bearded hawkweed
Distribution: Occurring in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon; endemic to the Columbia River Gorge.
Habitat: Dry rocky slopes and ledges.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Distribution: Occurring in the Columbia River Gorge in Washington; south-central Washington to adjacent north-central Oregon; endemic to the Columbia River Gorge.
Habitat: Dry rocky slopes and ledges.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Hieracium maculatum – mottled hawkweed
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to western Washington.
Habitat: Lawns, railroads, wastelots, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to western Washington.
Habitat: Lawns, railroads, wastelots, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Hieracium murorum – wall hawkweed
Distribution: Occurring in scattered locations west of the Cascades crest in Washington; southern British Columbia to northern Oregon.
Habitat: Roadsides, open forest, railroads, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
Distribution: Occurring in scattered locations west of the Cascades crest in Washington; southern British Columbia to northern Oregon.
Habitat: Roadsides, open forest, railroads, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
Hieracium pilosella – mouse-ear hawkweed
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon; also in northeastern North America.
Habitat: Roadsides, dry prairies, quarries, lawns, railroads, and other disturbed, open sites.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon; also in northeastern North America.
Habitat: Roadsides, dry prairies, quarries, lawns, railroads, and other disturbed, open sites.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Hieracium piloselloides – tall hawkweed
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to northeastern Oregon.
Habitat: Roadsides, meadows, forest openings, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to northeastern Oregon.
Habitat: Roadsides, meadows, forest openings, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium sabaudum – savoy hawkweed
Distribution: Occurring west of the Cascades crest in Washington; southern British Columbia to Washington; also in eastern North America.
Habitat: Roadsides, sandy fields, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southern British Columbia to Washington; also in eastern North America.
Habitat: Roadsides, sandy fields, and other disturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium scouleri – hound-tongue hawkweed, Scouler's hawkweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, Wyoming, and Utah.
Habitat: Mostly dry places in open woods, from foothills to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, Wyoming, and Utah.
Habitat: Mostly dry places in open woods, from foothills to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hieracium ×stoloniflorum – forked hawkweed
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; no other reports from North America.
Habitat: Lawns, roadsides, ditches, and other disturbed areas, where escaping from cultivation.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; no other reports from North America.
Habitat: Lawns, roadsides, ditches, and other disturbed areas, where escaping from cultivation.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Hieracium triste – alpine hawkweed, slender hawkweed
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains of Canada and the U.S.
Habitat: Meadows and other open places in the mountains, usually at high elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains of Canada and the U.S.
Habitat: Meadows and other open places in the mountains, usually at high elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hieracium umbellatum – narrowleaf hawkweed, umbellate hawkweed
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to northwestern Oregon, east across the northern half of North America to the Atlantic Coast; circumboreal.
Habitat: Moist places in thickets and open woods.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest and in the Columbia River Gorge in Washington; Alaska to northwestern Oregon, east across the northern half of North America to the Atlantic Coast; circumboreal.
Habitat: Moist places in thickets and open woods.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Hierochloe odorata – hairy sweetgrass, vanillagrass
Distribution: Occurring in scattered locations across Washington; Alaska south to Washington, east across the northern half of North America to the Atlantic Coast.
Habitat: Wet meadows and marshes.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Distribution: Occurring in scattered locations across Washington; Alaska south to Washington, east across the northern half of North America to the Atlantic Coast.
Habitat: Wet meadows and marshes.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Hippuris montana – mountain mare's-tail
Distribution: Chiefly west of the Cascades in Washington; Alaska to Washington, east to Northwest Territories and Alberta.
Habitat: Wet meadows, streams and mossy banks in the moungtains
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Distribution: Chiefly west of the Cascades in Washington; Alaska to Washington, east to Northwest Territories and Alberta.
Habitat: Wet meadows, streams and mossy banks in the moungtains
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Hippuris vulgaris – common mare's-tail
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska to south California and New Mexico, east through southern Canada and the northern states to Maine.
Habitat: Streams, ponds and shallow lakes, generally at least partially emerged.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska to south California and New Mexico, east through southern Canada and the northern states to Maine.
Habitat: Streams, ponds and shallow lakes, generally at least partially emerged.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hirschfeldia incana – Mediterranean hoary mustard, short-podded mustard, summer mustard
Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Disturbed, open areas at low elevations.
Origin: Introduced
Flowers: April-October
Growth Duration: Annual, Biennial
Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Disturbed, open areas at low elevations.
Origin: Introduced
Flowers: April-October
Growth Duration: Annual, Biennial
Holcus lanatus – common velvet grass
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east across much of North America to the Atlantic Coast.
Habitat: Balds, prairies, roadsides, meadows, lawns, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east across much of North America to the Atlantic Coast.
Habitat: Balds, prairies, roadsides, meadows, lawns, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Holcus mollis – creeping softgrass, creeping velvet-grass
Origin: Introduced
Origin: Introduced
• ssp. mollis – creeping velvet grass
Holodiscus discolor – creambush ocean-spray, hillside ocean-spray
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Texas.
Habitat: Gravelly soil in open, dry to moist woods, coastal bluffs to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Texas.
Habitat: Gravelly soil in open, dry to moist woods, coastal bluffs to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
• var. discolor – ocean-spray
Holosteum umbellatum – jagged-chickweed
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: Disturbed, open areas in sagebrush desert, roadsides, fields, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Annual
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: Disturbed, open areas in sagebrush desert, roadsides, fields, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Annual
• ssp. umbellatum – jagged chickweed
Honckenya peploides – sea purslane, seabeach sandwort
Distribution: Occuring west of the Cascades crest in the coastal counties in Washington; Alaska to northern Oregon, east across Canada to coastal northeastern North America; Greenland and arctic Eurasia.
Habitat: Coastal beaches, strands, and sand dunes.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Distribution: Occuring west of the Cascades crest in the coastal counties in Washington; Alaska to northern Oregon, east across Canada to coastal northeastern North America; Greenland and arctic Eurasia.
Habitat: Coastal beaches, strands, and sand dunes.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
• ssp. major – sea purslane, seabeach sandwort
Hordeum brachyantherum – meadow barley
Distribution: Alaska south to California, east to Montana and Colorado.
Habitat: Ocean beaches to mountain meadows,usually where moist, but also from dry sagebrush desert to rocky ridges.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Distribution: Alaska south to California, east to Montana and Colorado.
Habitat: Ocean beaches to mountain meadows,usually where moist, but also from dry sagebrush desert to rocky ridges.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
• ssp. brachyantherum – meadow barley
Hordeum depressum – dwarf barley
Distribution: Introduced from Vancouver Island, British Columbia, south on both sides of the Cascades to southern California, east to western Idaho.
Habitat: A weed of waste areas, especially where moist.
Origin: Native
Flowers: April - June
Growth Duration: Annual
Distribution: Introduced from Vancouver Island, British Columbia, south on both sides of the Cascades to southern California, east to western Idaho.
Habitat: A weed of waste areas, especially where moist.
Origin: Native
Flowers: April - June
Growth Duration: Annual
Hordeum jubatum – foxtail barley
Distribution: Alaska south on both sides of the Cascades to California, east across Canada to the Atlantic Coast, south to Mexico.
Habitat: Common weed of dry to moist soil, from sagebrush desert to grasslands and mountain forests, often abundent in disturbed areas.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Distribution: Alaska south on both sides of the Cascades to California, east across Canada to the Atlantic Coast, south to Mexico.
Habitat: Common weed of dry to moist soil, from sagebrush desert to grasslands and mountain forests, often abundent in disturbed areas.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
• ssp. jubatum – foxtail barley
Hordeum marinum – Mediterranean barley
Origin: Introduced
Growth Duration: Annual
Origin: Introduced
Growth Duration: Annual
• ssp. gussoneanum – Mediterranean barley
Hordeum murinum – mouse barley, smooth barley, wall barley
Distribution: Uncommon weed in the United States, occasional in southern British Columbia and western Washington.
Habitat: Disturbed soil and wasteland.
Origin: Introduced
Flowers: June - July
Growth Duration: Annual
Distribution: Uncommon weed in the United States, occasional in southern British Columbia and western Washington.
Habitat: Disturbed soil and wasteland.
Origin: Introduced
Flowers: June - July
Growth Duration: Annual
• ssp. glaucum – mouse barley
• ssp. leporinum – mouse barley
• ssp. murinum – mouse barley
Hordeum pusillum – little barley
Distribution: Eastern Washington south to southern California, east to the Atlantic Coast.
Habitat: Grasslands to desert areas, often on saline soils and wasteland.
Origin: Native
Flowers: April - June
Growth Duration: Annual
Distribution: Eastern Washington south to southern California, east to the Atlantic Coast.
Habitat: Grasslands to desert areas, often on saline soils and wasteland.
Origin: Native
Flowers: April - June
Growth Duration: Annual
Hordeum vulgare – barley
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Old fields, wasteland, roadsides, and other disturbed areas where escaped from cultivation.
Origin: Introduced
Flowers: May-June
Growth Duration: Annual
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Old fields, wasteland, roadsides, and other disturbed areas where escaped from cultivation.
Origin: Introduced
Flowers: May-June
Growth Duration: Annual
• ssp. vulgare – common barley
Horkelia fusca – horkelia
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho, Nevada, and Wyoming.
Habitat: Damp meadows to open forest and rocky slopes at middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho, Nevada, and Wyoming.
Habitat: Damp meadows to open forest and rocky slopes at middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
• var. capitata – horkelia
Hornungia procumbens – hutchinsia, prostrate hutchinsia, ovalpurse
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, central Canada, and Newfoundland.
Habitat: Open areas where seasonally moist.
Origin: Introduced from Europe, North Africa, and Asia
Flowers: March-June
Growth Duration: Annual
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, central Canada, and Newfoundland.
Habitat: Open areas where seasonally moist.
Origin: Introduced from Europe, North Africa, and Asia
Flowers: March-June
Growth Duration: Annual
Hosackia crassifolia – big deervetch
Distribution: Occurring chiefly west of the Cascades in Washington; Washington to California.
Habitat: Moist woods and along streams, from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades in Washington; Washington to California.
Habitat: Moist woods and along streams, from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
• var. crassifolia – big deervetch
Hosackia gracilis – seaside bird's-foot-trefoil
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: On moist soil, from near sea level to lower elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: On moist soil, from near sea level to lower elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Hosackia pinnata – meadow bird's-foot-trefoil, meadow deervetch
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
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
Hosackia rosea – rosy bird's-foot-trefoil
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Moist woods and along streams.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Moist woods and along streams.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Howellia aquatilis – water Howellwort
Distribution: Chiefly west of the Cascades in Washington; Washington south to California, east to Idaho and Montana.
Habitat: In ponds and lakes.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Distribution: Chiefly west of the Cascades in Washington; Washington south to California, east to Idaho and Montana.
Habitat: In ponds and lakes.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Hulsea nana – dwarf alpinegold, dwarf hulsea
Distribution: Known from the Mt. Rainier and Mt. Adams area in Washington; Washington south to California.
Habitat: Generally around volcanic mountains above timberline.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Distribution: Known from the Mt. Rainier and Mt. Adams area in Washington; Washington south to California.
Habitat: Generally around volcanic mountains above timberline.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Humulus lupulus
Distribution: Occasionally escaping from cultivation, but rarely becoming established in Washington; occasionally escaped from cultivation in many areas in North America.
Habitat: Waste ground.
Origin: Introduced
Flowers: July-August
Growth Duration: Perennial
Distribution: Occasionally escaping from cultivation, but rarely becoming established in Washington; occasionally escaped from cultivation in many areas in North America.
Habitat: Waste ground.
Origin: Introduced
Flowers: July-August
Growth Duration: Perennial
• var. neomexicanus – hops
Huperzia continentalis – alpine firmoss
Distribution: In the Olympics and Cascades mountains in Washington; primarily Alaska to Washington, east to Montana; also in Wyoming and Colorado, scattered across northern Canada and on Greenland.
Habitat: Subalpine and alpine meadows, heath, and rocky slopes. Usually at high elevations.
Origin: Native
Growth Duration: Perennial
Distribution: In the Olympics and Cascades mountains in Washington; primarily Alaska to Washington, east to Montana; also in Wyoming and Colorado, scattered across northern Canada and on Greenland.
Habitat: Subalpine and alpine meadows, heath, and rocky slopes. Usually at high elevations.
Origin: Native
Growth Duration: Perennial
Huperzia miyoshiana – fir clubmoss
Distribution: Occurring west of the Cascades crest in Washington; Alaska to northwest Oregon, east to Idaho and western Montana; also in eastern Asia.
Habitat: Moist, brushy talus slopes, edges of coniferous forests, or mossy rocks, from middle elevations to the subalpine.
Origin: Native
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; Alaska to northwest Oregon, east to Idaho and western Montana; also in eastern Asia.
Habitat: Moist, brushy talus slopes, edges of coniferous forests, or mossy rocks, from middle elevations to the subalpine.
Origin: Native
Growth Duration: Perennial
Huperzia occidentalis – western clubmoss
Distribution: Coastal ranges from SE Alaska and SW Yukon south to Oregon; also in SE British Columbia, northern Idaho, and northwest Montana. Not found outside North America. In Washington, found from the west side of the Cascades west to the coast.
Habitat: In shaded conifer forest, usually where moist such as along streams and in depressions; rooted on decaying logs, duff, or soil. Low to mid elevations.
Origin: Native
Growth Duration: Perennial
Distribution: Coastal ranges from SE Alaska and SW Yukon south to Oregon; also in SE British Columbia, northern Idaho, and northwest Montana. Not found outside North America. In Washington, found from the west side of the Cascades west to the coast.
Habitat: In shaded conifer forest, usually where moist such as along streams and in depressions; rooted on decaying logs, duff, or soil. Low to mid elevations.
Origin: Native
Growth Duration: Perennial
Hyacinthoides ×massartiana – common bluebell, garden bluebell, hybrid bluebell
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to Oregon.
Habitat: Meadows, fields, grassy balds, and other open areas at low elevations.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to Oregon.
Habitat: Meadows, fields, grassy balds, and other open areas at low elevations.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Perennial
Hydrilla verticillata – hydrilla, water-thyme
Distribution: Occurring west of the Cascades crest in Washington, where known only from King County; Washington, California, and in the southern and eastern U.S.
Habitat: Ponds, lakes, and slow-moving streams at low elevation.
Origin: Introduced from Eurasia
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington, where known only from King County; Washington, California, and in the southern and eastern U.S.
Habitat: Ponds, lakes, and slow-moving streams at low elevation.
Origin: Introduced from Eurasia
Growth Duration: Perennial
Hydrocharis morsus-ranae – European frog-bit
Distribution: Occurring west of the Cascades crest in Washington, where known from Snohomish County; Washington and Quebec, Canada.
Habitat: Ponds and lakes at low elevations.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington, where known from Snohomish County; Washington and Quebec, Canada.
Habitat: Ponds and lakes at low elevations.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
Hydrocotyle ranunculoides – floating marsh-pennywort
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California, east to the Atlantic coast.
Habitat: Marshes, ponds and wet ground.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California, east to the Atlantic coast.
Habitat: Marshes, ponds and wet ground.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Hydrophyllum capitatum – wool breeches, ballhead waterleaf
Distribution: Occurring mostly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist, open slopes and woodlands, foothills to middle elevations in the mountains.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
Distribution: Occurring mostly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist, open slopes and woodlands, foothills to middle elevations in the mountains.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
• var. capitatum – wool breeches, ballhead waterleaf
• var. thompsonii – Thompson's wool breeches, Thompson's ballhead waterleaf
Hydrophyllum fendleri – Fendler's waterleaf
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Utah.
Habitat: Thickets and moist open places, from lowlands to mid elevations in mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Utah.
Habitat: Thickets and moist open places, from lowlands to mid elevations in mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
• var. albifrons – Fendler's waterleaf
• var. fendleri – Fendler's waterleaf
Hydrophyllum tenuipes – Pacific waterleaf
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.
Habitat: Forest understory and edge at low elevations, often where moist.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California.
Habitat: Forest understory and edge at low elevations, often where moist.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Hymenopappus filifolius – Columbia cut-leaf, fineleaf hymenopappus
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Great Plains of Canada and the U.S.
Habitat: Dry, often sandy places in the foothills and plains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Great Plains of Canada and the U.S.
Habitat: Dry, often sandy places in the foothills and plains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
• var. filifolius – Columbia cutleaf
Hyoscyamus niger – hog's bean, black henbane
Distribution: Scattered localities on both sides of the Cascades in Washington; widely distributed throughout uNorth America from Alberta to Nevada, east to central and northeastern North America.
Habitat: Roadsides and waste places.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Annual
Distribution: Scattered localities on both sides of the Cascades in Washington; widely distributed throughout uNorth America from Alberta to Nevada, east to central and northeastern North America.
Habitat: Roadsides and waste places.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Annual
Hypericum anagalloides – bog John's-wort, creeping St. John's-wort, tinker's penny
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to Montana.
Habitat: Moist ground, from the coast to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to Montana.
Habitat: Moist ground, from the coast to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Hypericum boreale – northern St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Perennial
Origin: Introduced from eastern North America
Growth Duration: Perennial
Hypericum calycinum – Aaron's beard, great St. John's-wort
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Roadsides, cliffs, embankments, fields, parks, forest edge, wastelots, and other disturbed areas.
Origin: Introduced from Turkey and Bulgaria
Flowers: May-July
Growth Duration: Perennial
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California; also in eastern North America.
Habitat: Roadsides, cliffs, embankments, fields, parks, forest edge, wastelots, and other disturbed areas.
Origin: Introduced from Turkey and Bulgaria
Flowers: May-July
Growth Duration: Perennial
Hypericum canadense – Canadian St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Hypericum maculatum – spotted St. John's-wort, streaked St. John's-wort
Origin: Introduced
Origin: Introduced
• ssp. obtusiusculum – dotted John's-wort, imperforate St. John's-wort
Hypericum majus – greater Canadian St. John's-wort
Distribution: Occurring in localities throughout Washington; British Columbia south to Oregon, east to the Atlantic Coast of North America.
Habitat: Wet ground.
Origin: Both native and introduced from eastern North America
Flowers: July-September
Growth Duration: Annual
Distribution: Occurring in localities throughout Washington; British Columbia south to Oregon, east to the Atlantic Coast of North America.
Habitat: Wet ground.
Origin: Both native and introduced from eastern North America
Flowers: July-September
Growth Duration: Annual
Hypericum mutilum – dwarf St. John's-wort
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Origin: Introduced from eastern North America
Growth Duration: Annual, Perennial
Hypericum perforatum – common St. John's-wort, Klamath weed
Distribution: Widespread on both sides of the Cascades crest in Washington; widespread throughout much of North America.
Habitat: Noxious weed of fields, meadows, roadsides, forest edge, wastelots, and other disturbed areas from the lowlands to near subalpine.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Perennial
Distribution: Widespread on both sides of the Cascades crest in Washington; widespread throughout much of North America.
Habitat: Noxious weed of fields, meadows, roadsides, forest edge, wastelots, and other disturbed areas from the lowlands to near subalpine.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Perennial
Hypericum scouleri – Norton's St. John's-wort, Scouler's St. John's-wort, western John's-wort
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist places from along the coast to well up in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist places from along the coast to well up in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Hypericum tetrapterum – square-stalked St. John's Wort
Distribution: Introduced occasionally in western Washington.
Habitat: Damp wasteland.
Origin: Introduced
Flowers: July - September
Growth Duration: Perennial
Distribution: Introduced occasionally in western Washington.
Habitat: Damp wasteland.
Origin: Introduced
Flowers: July - September
Growth Duration: Perennial
Hypochaeris glabra – smooth cat's-ear
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, also from Texas to the northeastern U.S.
Habitat: Roadsides, rocky balds, meadows, wastelots, and other disturbed open areas at low elevations, often where sandy.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, also from Texas to the northeastern U.S.
Habitat: Roadsides, rocky balds, meadows, wastelots, and other disturbed open areas at low elevations, often where sandy.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Hypochaeris radicata – hairy cat's-ear, rough cat's-ear
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, and further east across most of North America to the Atlantic Coast.
Habitat: Disturbed areas, grassy balds, prairies, grasslands, lawns, and roadsides.
Origin: Introduced from Europe
Flowers: May-October
Growth Duration: Perennial
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, and further east across most of North America to the Atlantic Coast.
Habitat: Disturbed areas, grassy balds, prairies, grasslands, lawns, and roadsides.
Origin: Introduced from Europe
Flowers: May-October
Growth Duration: Perennial
