Rosaceae
Rose Family
41 genera
153 species
40 subspecies and varieties
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Agrimonia gryposepalatall hairy agrimony, tall hairy grooveburr
Distribution: Reported from Washington but currently no specimens exist; British Columbia to California, east to the Rocky Mountains.
Habitat: Edges, openings, draws, thickets, and open forest.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Amelanchier alnifoliasaskatoon, serviceberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Open woods, canyons and hillsides, sea level to subalpine.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Amelanchier utahensisUtah serviceberry
Distribution: Occurring east of the Cascades crest in Washington; Washington to Baja California, east to the Rocky Mountains and Texas.
Habitat: Rimrock, valleys, gullies and hillsides, from sagebrush desert to mid-elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Aphanes arvensiswestern lady's-mantle, field parsley-piert
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southern British Columbia to California, reported in Idaho, also along Atlantic Coast in the U.S.
Habitat: Ledges, often limy, sandy shores, hot springs, and other disturbed open ground at low elevations.
Origin: Introduced from Eurasia and northern Africa
Flowers: April-May
Growth Duration: Annual
Aphanes australissmall-fruited parsley-piert
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to northwestern Oregon, also in southeastern U.S.
Habitat: Openings, shores, lawns, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
Aphanes occidentaliswestern parsley-piert
Distribution: Occurring west of the Cascades crest in lowland western Washington and east in the Columbia River Gorge; southern British Columbia to California.
Habitat: Vernally damp grasslands, balds, fields, ledges, rocky slopes, open forest, shores, and beaches at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Aronia melanocarpablack chokeberry
Origin: Introduced
Aruncus dioicussylvan goatsbeard
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Alberta, also in the eastern half of North America.
Habitat: Moist forest and forest edge from low elevations to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
var. acuminatus – Sylvan goatsbeard
Cercocarpus ledifoliusmountain mahogany
Distribution: Occurring east of the Cascades crest in southeastern Washington (population in Chelan County was planted); southeastern Washington to California, east to the Rocky Mountains.
Habitat: Dry areas, from foothills to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
var. intermontanus – birchleaf mountain-mahogany
var. ledifolius – mountain mahogany
Comarum palustremarsh cinquefoil, purple marshlocks
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across the northern portion of North America to the Atlantic Coast.
Habitat: Bogs, wet meadows and lake margins, sea level to subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Cotoneaster atropurpureuspurple-flowering cotoneaster
Origin: Introduced
Cotoneaster dammeribearberry cotoneaster
Origin: Introduced from China
Growth Duration: Perennial
Cotoneaster dielsianusDiel's cotoneaster
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwest British Columbia to southwest Oregon.
Habitat: Thickets, open forest, rocky slopes, meadows, and grasslands at low elevations.
Origin: Introduced from China
Flowers: May-July
Growth Duration: Perennial
Cotoneaster divaricatusspreading cotoneaster
Origin: Introduced from China
Growth Duration: Perennial
Cotoneaster franchetiifranchet's cotoneaster, orange cotoneaster
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to California.
Habitat: Lowland forest edges, grassy balds, and disturbed areas.
Origin: Introduced from China
Flowers: May-June
Growth Duration: Perennial
Cotoneaster horizontalisrock cotoneaster, rockspray cotoneaster, wall cotoneaster
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to Oregon; also in Ontario, Canada.
Habitat: Fields, forest openings, and disturbed areas typically at low elevations.
Origin: Introduced from China
Flowers: May-June
Growth Duration: Perennial
Cotoneaster lacteuslate cotoneaster, milk-flower cotoneaster
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to California.
Habitat: Disturbed areas, thickets, and forest margins.
Origin: Introduced from China
Flowers: May-July
Growth Duration: Perennial
Cotoneaster lucidusshiny cotoneaster
Origin: Introduced from Siberia and Mongolia
Growth Duration: Perennial
Cotoneaster rehderibullate cotoneaster, puckered-leaf cotoneaster
Distribution: Occurring west of the Cascades crest in lowland western Washington; Alaska to Washington.
Habitat: Thickets, open clearings, forests, and shores typically at low elevations.
Origin: Introduced from China
Flowers: May-Jun; fruiting Sep-Dec.
Growth Duration: Perennial
Cotoneaster salicifoliuswillow-leaved cotoneaster
Origin: Introduced from China
Growth Duration: Perennial
Cotoneaster simonsiiHimalayan cotoneaster, Simon's cotoneaster
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to central California.
Habitat: Thickets, forest openings, shorelines, balds, parks, and grasslands.
Origin: Introduced from southeast Asia
Flowers: May-July
Growth Duration: Perennial
Cotoneaster ×suecicus
Origin: Introduced
Cotoneaster tengyuehensisTengyueh cotoneaster
Origin: Introduced from China
Growth Duration: Perennial
Crataegus castlegarensisCastlegar hawthorn
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to California, east to Idaho, Montana, and Utah.
Habitat: Grasslands, riparian zones, thickets, openings, and seeps.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Crataegus chrysocarpafireberry hawthorn
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Thickets, dry slopes, shrub-steppe, riparian zones, forest openings.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Crataegus ×cogswelliiOregon hybrid hawthorn
Distribution: Occurring west of the Cascades crest in Washington; western Washington to the Willamette Valley in Oregon.
Habitat: Wet prairie, thickets, and shores, generally occurring near where both parent species occur.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
Crataegus douglasiiblack hawthorn, Douglas's hawthorn
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Saskatchewan, Idaho and Montana, also in the Great Lakes region.
Habitat: Thickets, open forests, forest edges, and riparian zones, from lowlands to middle elevations.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Crataegus gaylussaciahuckleberry hawthorn, Suksdorf's hawthorn
Distribution: Occurring on both sides of the Cascades crest in Washington; disjunct in southeast Alaska, otherwise southern British Columbia to California, east to Montana.
Habitat: Thickets, grasslands, riparian zones, shores, and meadows, from lowl to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Crataegus laevigatamidland hawthorn, woodland hawthorn
Distribution: Known only from the San Juan Islands in Washington.
Origin: Introduced from northern Europe
Growth Duration: Perennial
Crataegus macracanthalarge-thorned hawthorn, western large-thorned hawthorn
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to northeastern Oregon, east to the Rocky Mountains, and further east across the U.S. and Canada to the Atlantic Coast.
Habitat: Thickets, riparian zones, and pastures.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Crataegus monogynaEnglish hawthorn, one-seed hawthorn
Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to California, east to Montana, also in the Great Lakes region and eastern North America.
Habitat: Roadsides, fields, pastures, meadows, thickets, and forest edge and understory at low elevations, often associated with disturbance. Seeds readily dispersed by birds.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
var. monogyna – common hawthorn, English hawthorn, one-seeded hawthorn
Crataegus okanaganensisOkanagan hawthorn
Distribution: Occurring east of the Cascades crest in Washington in northern Washington; southern British Columbia to northern Washington, east to northern Idaho.
Habitat: Mesic thickets, riparian zones, and shorelines.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Crataegus okennoniiO'Kennon's hawthorn
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Washington, east to Idaho and Montana.
Habitat: Thickets, riparian zones, and grasslands.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Crataegus phaenopyrumWashington thorn
Distribution: Occurring west of the Cascades crest in lowland western Washington; Washington to Oregon, and also in eastern North America where native.
Habitat: Grasslands, shores, and damp thickets.
Origin: Introduced from eastern North America
Flowers: May-July
Growth Duration: Perennial
Crataegus phippsiiPhipps's hawthorn
Distribution: Occurring east of the Cascades crest in north-central Washington; southern British Columbia to northern Washington, also in Montana but not known from Idaho.
Habitat: Floodplains, open forests, and thickets.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Crataegus tenuiorslender red hawthorn
Distribution: Occurring east of the Cascades crest in north-central Washington; south-central British Columbia to north-central Washington.
Habitat: Grasslands, thickets, and forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Dasiphora fruticosashrubby cinquefoil
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Open areas from low elevations to alpine slopes.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Dryas drummondiiyellow mountain-avens
Distribution: Known from only a small number of scattered locations on both sides of the Cascades crest in Washington; Alaska to the North Cascades and Selkirk Mountains of Washington, the Wallowa Mountains of Oregon, and the Rocky Mountains of Montana; east across Canada to the Atlantic Coast.
Habitat: High elevations, often above timberline, but down to lower elevations along streams
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Dryas hookerianawhite dryas, Hooker's mountain-avens, white mountain-avens
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to Washington, northeast Oregon, and in the Rockies from Northwest Territory to Montana, Idaho, Utah, Wyoming and Colorado.
Habitat: Open, rocky areas, middle to high elevations in the mountains.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Drymocallis argutacordilleran drymocallis
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
Drymocallis campanulataJohn Day cinquefoil, John Day wood beauty
Distribution: Occurring east of the Cascades crest in south-central Washington; south-central Washington to north-central and east-central Oregon.
Habitat: Basalt cliffs, talus, canyons, and washes.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Drymocallis glandulosasticky cinquefoil
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho, Utah, and Arizona.
Habitat: Open, mesic areas from coastal meadows to forest openings, to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
ssp. glabrata – Idaho wood beauty
ssp. glandulosa – gland cinquefoil, sticky cinquefoil
ssp. pseudorupestris – cliff drymocallis
Duchesnea indicaIndian-strawberry, mock-stawberry
Distribution: Occurring west of the Cascades crest in lowland western Washington; southwestern British Columbia to Oregon; also in eastern North America.
Habitat: Disturbed forest and forest edge at low elevations, where escaping from cultivation.
Origin: Introduced from Asia
Flowers: May-June
Growth Duration: Perennial
var. indica – Indian strawberry, mock strawberry
Filipendula occidentalisqueen-of-the-forest
Distribution: Occurring west of the Cascades crest in southwestern Washington; southwestern Washington and adjacent northwestern Oregon.
Habitat: Damp mossy river rocks, near high water line, wet rocky slopes.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Fragaria chiloensisbeach strawberry, coastal strawberry
Distribution: Occurring west of the Cascades crest in the coastal counties of Washington; Alaska to California.
Habitat: Sand dunes, strand, headlands, and other open coastal habitats.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
ssp. pacifica – beach strawberry, coastal strawberry
Fragaria vescawoodland strawberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Moist woods, stream banks and sandy meadows, low to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
ssp. californica – woodland strawberry
Fragaria virginianablueleaf strawberry, mountain strawberry
Distribution: Occurring chiefly east of the Cascades crest in Washington except in sagebrush areas; Alaska to California, east to the Atlantic Coast.
Habitat: Open woods to gravelly meadows in the plains and lower mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
ssp. glauca – blueleaf strawberry, broadpetal strawberry, wild strawberry
Geum aleppicumyellow avens
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east across Canada and the U.S., except the south-central and southeast regions, to the Atlantic Coast.
Habitat: Shores, streams, damp thickets, damp forests, wet meadows, and peatlands.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Geum macrophyllumbigleaf avens, large-leaved avens
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to Baja California, east to the Great Plains and east across Canada to the Atlantic Coast.
Habitat: Common in moist woods and meadows from sea level to subalpine.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Geum rivalepurple avens, water avens
Distribution: Occurring east of the Cascades crest in the northeastern counties in Washington; British Columbia to northeastern Washington, east to the Rocky Mountains, northern Great Plains, Great Lakes region and northeastern North America; circumboreal.
Habitat: Stream banks, lake shores, bogs and wet meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Geum rossiiRoss's avens
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington; Alaska to California, east to the Rocky Mountains, and eastward across northern Canada to Greenland; also in Far East Russia.
Habitat: Arctic tundra, high gravelly meadows and scree slopes.
Origin: Native
Flowers: June- August
Growth Duration: Perennial
Geum triflorumprairie smoke, old-man's whiskers
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the northern Great Plains, and Great Lakes regions.
Habitat: Prairies, balds, and moister places in the sagebrush plains, from the foothills to subalpine ridges.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Geum urbanumherb-bennet
Distribution: In scattered locations on both sides of the Cascades crest in Washington; Washington to Oregon, east to Idaho and Utah.
Habitat: Disturbed areas in including, roadsides, wastelots, and fields.
Origin: Introduced from Eurasia
Flowers: May-September
Growth Duration: Perennial
Holodiscus discolorcreambush 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
var. discolor – ocean-spray
Luetkea pectinataluetkea, partridgefoot
Distribution: Occurring in the Olympic and Cascades mountains in Washington; Alaska to California, east to Northwest Territory, Alberta, Idaho, and Montana.
Habitat: Usually on sandy soil in moist or shady places, subalpine to alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Malus baccataSiberian crabapple
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southwestern British Columbia to southern Washington.
Habitat: Mesic thickets and riparian zones.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Malus ×dawsonianaDawson apple
Distribution: Occurring west of the Cascades crest in Washington; Washington to Oregon.
Habitat: Fields, thickets, open damp forests, sea bluffs, roadsides, wastelots, and abandoned homesteads.
Origin: Escaping from cultivation
Flowers: April-May
Growth Duration: Perennial
Malus domesticacultivated apple, orchard apple
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Mesic thickets and riparian zones.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Malus fuscaOregon crabapple, western crabapple
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California.
Habitat: Moist woods, swamps and open canyons from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Malus hupehensisflowering tea crabapple
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to southwestern Washington, also in Illinois.
Habitat: Seasonally damp thickets, open forest.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Malus prunifoliapearleaf crabapple, plumleaf crabapple
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to northern Oregon, also in the Great Lakes region and northeastern North America.
Habitat: Damp thickets, forest edges, and riparian zones.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Oemleria cerasiformisoso-berry, Indian plum
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Moist to dry, open forest, forest edge, and stream bank thickets at low elevation.
Origin: Native
Flowers: February-April
Growth Duration: Perennial
Petrophytum caespitosumRocky Mountain rockmat
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to California, east to Montana, Idaho, New Mexico, Texas, and South Dakota.
Habitat: Dry, limy or granite cliffs, ledges, talus, and rocky slopes, lowland to alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
ssp. caespitosum – Rocky Mountain rockmat
Petrophytum cinerascensChelan rockmat
Distribution: Occurring east of the Cascades crest, where endemic to the Columbia River region of central Washington.
Habitat: Basaltic cliffs.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Petrophytum hendersoniiOlympic Mountain rockmat
Distribution: Occurring west of the Cascades crest, where endemic to the Olympic Mountains.
Habitat: Rocky cliffs and talus slopes at middle to high elevations.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Photinia davidianaChinese redtip, stranvaesia
Distribution: Occurring west of the Cascades crest in lowland western Washington.
Habitat: Thickets, open forests, shores, rarely epiphytic
Origin: Introduced from China
Flowers: April-June
Growth Duration: Perennial
var. davidiana – Chinese redtip, stranvaesia
Physocarpus capitatusPacific ninebark
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Idaho.
Habitat: Moist woods and swamps in the lower mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Physocarpus malvaceusmallow ninebark, mallow-leaf ninebark
Distribution: Occurring east of the Cascades crest in eastern Washington; British Columbia to Oregon and Nevada, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Canyons and hillsides, grasslands, ponderosa pine and Douglas-fir forest openings and edge.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Potentilla anserinasilverweed cinquefoil, common silverweed
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Great Plains, Great Lakes region, and northeastern North America.
Habitat: Wet, alkaline areas from coast to arid inlands.
Origin: Native
Flowers: April-October
Growth Duration: Perennial
ssp. anserina – silvery cinquefoil, common silverweed
ssp. pacifica – Pacific silverweed
Potentilla argenteahoary cinquefoil, silver cinquefoil
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Sandy or gravely soil, typically where disturbed.
Origin: Introduced from Eurasia
Flowers: June-July
Growth Duration: Perennial
Potentilla biennisbiennial cinquefoil
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Disturbed areas, typically where moist to wet.
Origin: Native
Flowers: May-August
Growth Duration: Annual, Biennial
Potentilla breweriBrewer's cinquefoil
Distribution: Occurring east of the Cascades crest from central Washington south; central Washington to California, east to Nevada.
Habitat: Moist meadows and stream banks to open slopes at middle to high elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla douglasii
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
var. douglasii – Douglas's cinquefoil
Potentilla drummondiiDrummond's cinquefoil
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, and Montana.
Habitat: Forest openings, meadows and high ridges, middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla flabellifoliafan-leaf cinquefoil, fringe-leaf cinquefoil, fan-foil
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada, east to Alberta, Montana and Wyoming.
Habitat: Common in moist meadows from middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla glaucophyllablueleaf cinquefoil, different-leaved cinquefoil, diverse-leaved cinquefoil, vari-leaved cinquefoil
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist subalpine and alpine meadows, and along stream banks in high mountain forests.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla gordoniiGordon's ivesia, alpine mousetail
Distribution: Occurring chiefly east of the Cascades crest from central Washington south; central Washington to California, east to Montana, Wyoming, and Colorado.
Habitat: Rocky slopes, grassland, sagebrush, forest openings, and subalpine to alpines ridges.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla gracilisslender cinquefoil
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Varied habitats; moderately saline soil, grasslands, moist areas in shrub-steppe, forested mountains and subalpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. brunnescens – glandular cinquefoil
var. flabelliformis – comb-leaf cinquefoil, Elmer's cinquefoil, Idaho cinquefoil
var. gracilis – Hall's cinquefoil, slender cinquefoil, wooly cinquefoil
var. pulcherrima – beautiful cinquefoil
Potentilla hookerianaHooker's cinquefoil
Distribution: British Columbia to Nevada, east to Alberta, Montana, Wyoming, and Colorado.
Habitat: Alpine limy cliffs, rocky slopes, fellfields, scree, and river canyons.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla hyparcticasubarctic cinquefoil
Distribution: Known only from west of the Cascades crest in Whatcom County in Washington; Alaska to Washington, also south to south-central Montana and Wyoming; circumboreal.
Habitat: Alpine rocky slopes, talus, heath, turf, and snowmelt meadows, often acidic.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
ssp. elatior – subarctic cinquefoil
Potentilla jepsoniiJepson's cinquefoil
Origin: Native
var. kluanensis – Kluane cinquefoil
Potentilla newberryiNewberry's cinquefoil
Distribution: Known historically (1898) from the Columbia River Gorge in Washington, now likely extirpated; central Oregon to California, east to northwestern Nevada.
Habitat: Vernal pools, shores, and mudflats.
Origin: Native
Flowers: April-May
Growth Duration: Annual, Biennial, Perennial
Potentilla niveasnow cinquefoil
Distribution: Occurring on both sides of the Cascades crest in northern Washington; Alaska to Washington, east to the southern Rocky Mountains to Colorado, further east to eastern North America.
Habitat: Arctic tundra and gravel bars to alpine slopes and meadows.
Origin: Native
Flowers: June August
Growth Duration: Perennial
Potentilla norvegicaNorwegian cinquefoil, rough cinquefoil
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Usually in moist soil, often along irrigation ditches or in waste places.
Origin: Native
Flowers: May-August
Growth Duration: Annual, Biennial, Perennial
Potentilla pensylvanicaPennsylvania cinquefoil
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains, and further east across the northern U.S. and Canada to the Atlantic Coast; also in Eurasia.
Habitat: Damp alpine meadows, rocky slopes, ridges, and talus.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. ovium – Jepson's cinquefoil
Potentilla rectasulphur cinquefoil
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, but not in Yukon Territory, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, trails, and disturbed ground.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Potentilla rivalisbrook cinquefoil, river cinquefoil
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to central North America, and further east to the northeastern U.S.
Habitat: Damp soil, especially along rivers and around lakes, ponds, and swamps at low elevations.
Origin: Native
Flowers: May-September
Growth Duration: Annual, Biennial
Potentilla supinabushy cinquefoil
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, Great Plains, and east across Canada and the midwestern U.S. to northeastern North America.
Habitat: Sandy stream banks, lake shores, and moist flats.
Origin: Native
Flowers: June-July
Growth Duration: Annual, Biennial
ssp. paradoxa – bushy cinquefoil
Potentilla tweedyiTweedy's mousetail
Distribution: Occurring east of the Cascades crest in Washington; Washington to Idaho and Montana.
Habitat: Dry, open to wooded areas, middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Potentilla villosanorthern cinquefoil, villous cinquefoil
Distribution: Occurring in the North Cascades, Olympic Mountains, and at Mt. Rainier in Washington; Alaska to Oregon.
Habitat: Arctic tundra to alpine ridges, talus slopes and rock crevices.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Poteridium annuumannual burnet, prairie burnet
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to northern California, east to the Rocky Mountains, also in eastern North America.
Origin: Native
Growth Duration: Annual
Poterium sanguisorbafodder burnet, small burnet
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; southern British Columbia to California, east to the Great Plains, also in eastern North America.
Habitat: Roadsides, shores, pastures, wastelots, and other disturbed open areas.
Origin: Introduced from Eurasia and North Africa
Flowers: June-August
Growth Duration: Perennial
var. polygamum – burnet bloodwort, fodder burnet, small burnet
Prunus americanaAmerican plum, wild plum
Distribution: Occurring east of the Cascades crest in southcentral and southeastern Washington; Washington to Oregon, east to the Rocky Mountains, and further east across North America to the Atlantic Coast.
Habitat: Along watercourses, and on open or wooded, moist or dry areas from the plains into the lower mountains.
Origin: Native and introduced from further east of Washington
Flowers: April-May
Growth Duration: Perennial
Prunus armeniacaapricot
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains, and in scattered areas eastward to the Atlantic Coast.
Habitat: Sagebrush desert, ledges, gravel or clay slopes, thickets, and shorelines
Origin: Introduced from China
Flowers: March-May
Growth Duration: Perennial
Prunus aviumsweet cherry
Distribution: Occurring chiefly west of the Cascades crest in Washington, though distributed widely throughout the state; British Columbia to California, east to the Rocky Mountains, also in eastern North America.
Habitat: Forest edges, fields, wastelots, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: April-May
Growth Duration: Perennial
Prunus cerasiferacherry plum, Flowering plum
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington, but also in southeastern Washington; British Columbia to California, east to Idaho; also in northeastern North America.
Habitat: Open, disturbed areas typically at low elevations.
Origin: Introduced
Flowers: March-April
Growth Duration: Perennial
Prunus cerasussour cherry
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east to Idaho and Montana, also east from the Great Plains to the midwestern U.S. and northeastern North America.
Habitat: Roadsides, thickets, forest edge, and fields.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Perennial
Prunus domesticacultivated plum
Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Idaho and Utah; in scattered locations of central and northeastern U.S.
Habitat: Fields, roadsides, forest openings, abandoned homesteads, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Perennial
Prunus dulcisalmond
Distribution: Occurring in scattered locations east of the Cascades crest and in the Columbia River Gorge in Washington; Washington, Idaho, and California.
Habitat: Disturbed areas, mostly along riparian zones and rocky slopes.
Origin: Introduced from western Asia and northern Africa
Flowers: March-May
Growth Duration: Perennial
Prunus emarginatabitter cherry
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Thickets, rocky slopes, open forests, shorelines, and openings, from the lowlands to subalpine.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Prunus laurocerasuslaurel cherry, cherry-laurel, English laurel
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California.
Habitat: Fields, forest edge, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
Prunus lusitanicaPortugal laurel
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to California.
Habitat: Thickets, forested slopes, grasslands, and shorelines.
Origin: Introduced from Europe
Flowers: April-June
Prunus mahalebmahaleb cherry, perfumed cherry
Distribution: Ocurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho, Utah, and also in the eastern United States.
Origin: Introduced from Eurasia
Flowers: May - June
Growth Duration: Perennial
Prunus padusEuropean bird cherry
Distribution: Occurring west of the Cascades crest in Washington; southern Alaska, southwestern British Columbia to northwestern Washington, Montana, and eastern North America.
Habitat: Ornamental, occasionally escapes
Origin: Introduced from Eurasia and northern Africa
Flowers: April-June
Growth Duration: Perennial
Prunus persicapeach
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southwestern British Columbia to California, east to Idaho; also in eastern North America.
Habitat: Thickets, shores, and disturbed ground.
Origin: Introduced from eastern Asia
Flowers: April-June
Growth Duration: Perennial
Prunus ×pugetensisPuget Sound cherry
Distribution: Occurring chiefly west of the Cascades crest in Washington; Southwestern British Columbia to northwestern Oregon, east in the Columbia River Gorge and in Chelan County, WA.
Habitat: Low elevations in forests or forest edges, or disturbed areas, typically where both parent species are present.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Prunus spinosablackthorn
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southwestern British Columbia to southern Oregon, east to Idaho.
Habitat: Moist draws, thickets, hillsides, roadsides, and railroads.
Origin: Introduced from Eurasia and northern Africa
Flowers: April-May
Growth Duration: Perennial
Prunus tomentosaNanking cherry
Distribution: Occurring east of the Cascades crest in central Washington; also in Utah, and from northern Great Plains east to northeastern North America.
Habitat: Thickets and hedgerows.
Origin: Introduced from Asia
Flowers: April-May
Growth Duration: Perennial
Prunus virginianacommon chokecherry, western chokecherry, white chokecherry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Thickets, open forest, shorelines, rocky slopes, and roadsides.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Prunus yedoensisYoshino cherry
Distribution: Occurring west of the Cascades crest in lowland western Washington; also occurring in central California.
Habitat: Thickets and shorelines, often where disturbed.
Origin: Introduced from Japan
Flowers: March-April
Growth Duration: Perennial
Purshia tridentataantelope-brush, bitterbrush
Distribution: Widely distributed east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Nebraska.
Habitat: Sagebrush desert and shrub-steppe to ponderosa pine forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
var. tridentata – anteleope-brush, bitterbrush
Pyracantha coccineafirethorn, scarlet firethorn
Distribution: O Occurring in scattered locations across Washington; British Columbia south to California, east to the Atlantic Coast along the southern half of the U.S.
Habitat: Disturbed areas, wastelots, and forest margins often near towns and cities where escaped from cultivation.
Origin: Introduced from western Asia
Flowers: May-June
Growth Duration: Perennial
Pyracantha fortuneanaChinese firethorn
Distribution: Occurring west of the Cascades crest in lowland western Washington; southern British Columbia to California and Arizona, also in the southern and southeastern U.S.
Habitat: Disturbed, open areas where escaped from cultivation through bird-dispersal.
Origin: Introduced from China
Flowers: January-May
Growth Duration: Perennial
Pyrus communiscommon pear
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Utah and New Mexico; also from southcentral U.S. east and northeast to the Atlantic Coast.
Habitat: Grasslands, thickets, shorelines, and forest openings;
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Rosa caninadog rose
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho, Utah, and Arizona; also from Great Plains east to the Atlantic Coast.
Habitat: Roadsides, thickets, forest edge, and other distrubed areas..
Origin: Introduced
Flowers: May-June
Growth Duration: Perennial
Rosa gymnocarpabald-hip rose
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common west of the crest; British Columbia to California, east to Montana.
Habitat: Dry to moist woods, forest edge, and thickets, from sea level to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Rosa multifloramultiflora rose, rambler rose
Distribution: Occurring on both sides of the Cascades crest in Washinton; British Columbia to California; east to the southern Rocky Mountains, Great Plains, and eastern North America where widespread.
Habitat: Roadsides, fields, highway and utility right of ways, forest edge, and other often moist, disturbed areas where escaping from cultivation.
Origin: Introduced from Asia
Flowers: April-June
Growth Duration: Perennial
Rosa nutkanaNootka rose
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Thickets, shores, forest edges, riparian zones, rocky slopes from low elevations to the montane.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
ssp. macdougalii – bristly Nootka rose
ssp. nutkana – Nootka rose
Rosa pisocarpaclustered rose, peafruit rose
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; southern British Columbia to California.
Habitat: Thickets, stream banks, and swampy places at lower elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Rosa rubiginosasweetbrier rose, small-flowered sweetbrier
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common west of the crest; southern British Columbia to California, east to Idaho, Montana, Wyoming, and Colorado, further east from the Great Plains to the Atlantic Coast.
Habitat: Roadsides, thickets, shorelines, pastures, and other disturbed, open areas.
Origin: Introduced Eurasia and northern Africa
Flowers: June-July
Growth Duration: Perennial
Rosa rugosarugosa rose
Distribution: Occurring west of the Cascades crest in coastal marine habitats; Alaska to Oregon; also in the north-central and northeastern areas of North America.
Habitat: Edge of saltwater beaches, roadsides, forest edge, fields, and other disturbed areas.
Origin: Introduced from Asia
Flowers: June-August
Growth Duration: Perennial
Rosa woodsiipearhip rose
Distribution: Occurring east of the Cascades crest in Washington; Alaska to California, east to the Great Plains and Great Lakes region.
Habitat: Valleys and hillsides at low elevations to forest openings at middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Rubus allegheniensisAllegheny blackberry, common blackberry
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to Washington and California (but apparently not Oregon), east to Idaho; also from the central Great Plains to eastern North America.
Habitat: Damp thickets, peatlands, and forest openings.
Origin: Introduced from central and eastern North America
Flowers: June-July
Growth Duration: Perennial
Rubus arcticusnagoonberry
Distribution: Occurring east of the Cascades crest in north-central Washington; Alaska to Oregon, east to the Rocky Mountains, and east across Canada to the Great Lakes Region and the northern Atlantic Coast.
Habitat: Montane meadows, bogs, and woodlands to alpine tundra.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Rubus bifronsHimalayan blackberry
Distribution: Occurrng on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, southern Great Plains, and eastern North America.
Habitat: Disturbed areas, riparian zones, and forest edges at low elevations.
Origin: Introduced from Eurasia
Flowers: May-August
Growth Duration: Perennial
Rubus idaeusred raspberry
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Wet or dry woodland to open and often rocky mountain slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
ssp. idaeus – red raspberry
ssp. strigosus – grayleaf red raspberry
Rubus laciniatuscut-leaf blackberry, evergreen blackberry
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Wyoming, and Colorado.
Habitat: Roadsides, forest understory and edge, thickets, and other disturbed areas, mostly at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Rubus lasiococcusroughfruit berry, dwarf bramble, hairy-fruit smooth dewberry
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; British Columbia to California.
Habitat: Moist to dry woods, lowlands to subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Rubus leucodermisblackcap raspberry, dark raspberry, whitebark raspberry
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to southern California, east to the Rocky Mountains.
Habitat: Thickets, forest edge and openings, fields, and hillsides from low to middle elevations.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Rubus nigerrimusdark raspberry, northwest raspberry
Distribution: Occurring east of the Cascades crest, where endemic along the Snake River in Whitman County, Washington;
Habitat: Moist hillsides, usually along streams.
Origin: Native
Flowers: May - June
Growth Duration: Perennial
Rubus nivalissnow dwarf bramble, snow dewberry
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
Rubus parviflorusthimbleberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, the Rocky Mountains, and Great Lakes region.
Habitat: Forest openings and edge, thickets, meadows, and riparian corridors from sea level to the subalpine.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Rubus pedatusstrawberry bramble, strawberry-leaf raspberry
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon, east to Alberta, Idaho, and Montana.
Habitat: Moist areas, open banks to dense forests, near sea level to timberline
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Rubus pensilvanicusPennsylvania blackberry
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California also occurring in western Idaho; otherwise in central and eastern North America, where native.
Habitat: Damp slopes, dry forests, and thickets.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
Rubus pubescensdwarf red blackberry, dwarf red blackberry raspberry, red raspberry
Distribution: Occurring east of the Cascades crest in northern Washington; Alaska to Washington, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Stream banks and moist woods to clearings where moderately dry, middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Rubus spectabilissalmonberry
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct in northern Idaho.
Habitat: Lowland moist woods and swamps to middle elevations in the mountains.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
Rubus ulmifoliuselm-leaf blackberry
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to California and Nevada; also in New Jersey.
Habitat: Fields, thickets, forest edge, and other disturbed areas.
Origin: Introduced Europe and northern Africa
Flowers: May-July
Growth Duration: Perennial
Rubus ursinusPacific blackberry, trailing blackberry, dewberry, Douglasberry
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
Rubus vestitusEuropean blackberry
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to Oregon, also reported from Idaho.
Habitat: Roadsides and waste ground.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Perennial
Sanguisorba menziesiiMenzies' burnet, small-head burnet
Distribution: Occurring west of the Cascades crest on the Olympic Peninsula in Washington; Alaska to Washington.
Habitat: Peatlands, wet meadows, shores, generally at middle elevations.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Sanguisorba officinalisgarden burnet, great burnet
Distribution: Occurring west of the Cascades crest on the Olympic Peninsula in Washington; Alaska to California; introduced in eastern North America; circumboreal.
Habitat: Peatlands, wet meadows, marshes, shorelines, and wet forests from the lowlands to subalpine.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Sanguisorba stipulataSitka burnet
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon, east to Idaho.
Habitat: Wet places at middle elevations in the mountains.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Sibbaldia procumbenscreeping-glow-wort, creeping sibbaldia
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, and east across most of Canda to the Atlantic Coasl.
Habitat: Open, dry to moist subalpine and alpine slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Sorbus aucupariaEuropean mountain-ash
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to Oregon, east to the Atlantic Coast.
Habitat: Forest edge, thickets, shorelines, and other generally moist areas where often disturbed.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Sorbus hybridaSwedish mountain-ash, Swedish service-tree
Distribution: Occurring west of the Cascades crest in lowland western Washington.
Habitat: Shoreline ledges and thickets at low elevations.
Origin: Introduced
Flowers: May-June
Growth Duration: Perennial
Sorbus scopulinaGreene's mountain ash, Cascade mountain-ash, western mountain-ash
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Open areas, from middle elevations to the subalpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Sorbus sitchensisSitka mountain-ash
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to northern California, east to Alberta, Idaho, and Montana.
Habitat: Forest openings at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. grayi – Sitka mountain-ash
var. sitchensis – Sitka mountain-ash
Spiraea douglasiiDouglas's spiraea, hardhack steeplebush
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana and Colorado.
Habitat: Swamps, lake margins and damp meadows, from sea level to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. douglasii – Douglas's spiraea
var. menziesii – Menzies's spiraea
Spiraea ×hitchcockiiHitchcock's spiraea
Distribution: Occurring in the Cascades in Washington; northern Washington to Oregon.
Habitat: Forest openings at low to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Spiraea lucidashiny-leaf spiraea, shinyleaf spiraea
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Saskatchewan and Wyoming.
Habitat: Stream banks and open to wooded areas, sea level to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Spiraea ×pyramidatapyramid spiraea
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to Idaho and Montana.
Habitat: Somewhat dry forest openings, from the lowlands to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Spiraea splendensrosy spiraea, subalpine spiraea
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada, east to Alberta, Idaho, Montana, and Wyoming.
Habitat: Moist forest openings and rocky slopes, middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial