Astragalus
locoweed, milk-vetch, poison-vetch, rattle-pod
45 species
22 subspecies and varieties
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Astragalus agrestiscock's-head, field milk vetch, purple milk vetch
Distribution: Occurring east of the Cascades crest in Washington; widely distributed in the western, central, and northeastern regions of North America.
Habitat: Moist spots in sagebrush plains, and mountain meadows to alpine slopes.
Origin: Native
Flowers: June-August
Astragalus alpinusalpine milk-vetch, purple milk-vetch
Distribution: Circumpolar, arctic to sub-alpine regions, south to Okanogan County, WA, the Wallowa Mountains of Oregon, and the Rocky Mountains of Montana and Idaho.
Habitat: Open, often rocky areas.
Origin: Native
Flowers: June - August
var. alpinus – alpine milk-vetch
Astragalus arrectushanging pod milk-vetch, Palouse milk-vetch
Origin: Native
Astragalus arthuriiArthur's milk-vetch, waha milk-vetch
Distribution: Occurring in the southeastern corner of Washington; northern foothills of the Wallowa and Blue Mountains in Oregon and Nez Perce County, Idaho.
Habitat: Dry, grassy and rocky meadows, on basalt.
Origin: Native
Flowers: May-June
Astragalus asotinensisAsotin milk-vetch
Distribution: Endemic to Snake River Canyon of WA and ID.
Habitat: Shrub-steppe at low to moderate elevations.
Origin: Native
Flowers: March-May
Astragalus australissubarctic milk-vetch
Distribution: Endemic to Olympic Mountains of Washington.
Habitat: Ridge tops and talus slopes.
Origin: Native
Flowers: June-August
var. cottonii – Cotton's milk-vetch, Cotton's milkvetch
Astragalus beckwithiiBeckwith's milk-vetch
Origin: Native
Flowers: April - June
var. weiserensis – Beckwith's milk-vetch
Astragalus canadensisCanada milk-vetch
Origin: Native
var. brevidens – Canada milk-vetch
var. canadensis – Canada milk-vetch
var. mortonii – Morton's Canadian milkvetch
Astragalus caricinusbuckwheat milk-vetch
Distribution: Occurring east of the Cascades crest in the south-central part of Washington; Washington south to Oregon, east to Idaho.
Habitat: Grasslands, dry and sandy slopes in shrub-steppe habitat.
Origin: Native
Flowers: April-May
Astragalus cicerchickpea milk-vetch
Distribution: Scattered locations throughout Washington; distributed throughout much of western North America, and central and eastern Canada.
Habitat: Disturbed areas, often where moist or wet.
Origin: Introduced from Old World
Flowers: July-August
Astragalus collinushill milk-vetch, hillside milk-vetch
Distribution: East of the Cascades, southern British Columbia south to Oregon, east to west-central Idaho along the Snake and Clearwater Rivers.
Habitat: Basaltic grasslands and sagebrush deserts.
Origin: Native
Flowers: May - June
var. collinus – hillside milk-vetch
Astragalus columbianusColumbian milk-vetch
Distribution: Occurring east of the Cascades crest in the south-central part of Washington; endemic to Washington;
Habitat: Dry, open areas in shrub-steppe.
Origin: Native
Flowers: April-May
Astragalus conjunctusbasalt milk-vetch, stiff milk-vetch
Distribution: Wasco County, Oregon, to the Blue Mountains, south along the Malheur River to the Steens, and east into Idaho
Habitat: Drier areas, moderate and higher elevations
Origin: Native
var. rickardii – stiff milk-vetch
Astragalus cusickiiCusick's milk-vetch
Distribution: Known only from Asotin County in Washington; Washington south to northeastern Oregon, east to Custer County, Idaho.
Habitat: Sagebrush plains to grassy or rocky slopes, often on talus.
Origin: Native
Flowers: May-July
var. cusickii – Cusick's milk vetch
Astragalus diaphanustransparent milk-vetch, John Day milk vetch
Distribution: Along the Columbia River from the mouth of the John Day river in Wasco County, Oregon, to Klickitat County, Washington.
Habitat: Gravel bars, alluvial slopes, and in thin gravelly soil overlying basaltic rock.
Origin: Native
Flowers: May - June
Astragalus eucosmuselegant milk-vetch
Origin: Native
Astragalus falcatusRussian-sickle
Origin: Introduced
Flowers: July
Astragalus filipesbasalt milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to northeast California, east to Nevada and Idaho.
Habitat: Sagebrush plains and lower foothills.
Origin: Native
Flowers: May-June
Astragalus geyeriGeyer's milk-vetch
Distribution: Southeast Oregon to California and Nevada, east through the Snake River drainage of Idaho.
Habitat: Sandy desert, especially on dunes.
Origin: Native
Flowers: June - July
var. geyeri – Geyer's milk-vetch
Astragalus hoodianusHood River milk-vetch
Distribution: Columbia River Gorge, Wasco and Hood River Counties in Oregon, Klickitat County in Washington
Habitat: Dry, open areas
Origin: Native
Flowers: April - June
Astragalus howelliiHowell's milk-vetch
Origin: Native
Flowers: April - June
Astragalus inflexusbent milk-vetch, hairy milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Dry hillsides in shrub-steppe habitat.
Origin: Native
Flowers: April-July
Astragalus kentrophytakentrophyta, thistle milk-vetch
Origin: Native
Flowers: July - September
var. douglasii – thistle milk vetch
Astragalus laxmanniistanding milk-vetch
Origin: Native
var. robustior – standing milk-vetch
Astragalus leibergiiLeiberg's milk-vetch
Distribution: Endemic to Douglas, Kittitas and Chelan counties of central Washington.
Habitat: Dry hillsides and plains, commonly in sagebrush scabland on basalt.
Origin: Native
Flowers: April-June
Astragalus lentiginosusfreckled milk-vetch, specklepod milk-vetch
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Texas.
Habitat: Open areas, desert flats to subalpine slopes.
Origin: Native
Flowers: April-June
var. lentiginosus – freckled milk-vetch, specklepod milk-vetch
Astragalus lyalliiLyall's milk-vetch
Distribution: Endemic to Washington from Kittitas and Douglas counties south to Benton, east to Grant and Adams counties.
Habitat: Sagebrush and desert areas, especially on sand dunes.
Origin: Native
Flowers: May-June
Astragalus microcystislesser-bladder milk-vetch
Distribution: Northeast Washington and adjacent British Columbia, across Idaho to Montana and Wyoming
Habitat: Prairies and foothills to Ponderosa pine forests
Origin: Native
Flowers: May - July
Astragalus miselluspauper milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Dry, open areas in shrub-steppe.
Origin: Native
Flowers: April-June
var. pauper – pauper milk-vetch
Astragalus miserweedy milk-vetch
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia and northern Washington east to Alberta and South Dakota, and south in the Rockies to Colorado.
Habitat: Moist meadowlands to open, dry ridges, and in grasslands and foothills to above timberline in the mountains.
Origin: Native
Flowers: May-July
var. miser – weedy milk-vetch
var. serotinus – weedy milk-vetch
Astragalus pulsiferaeAmes's milk-vetch
Distribution: Mt. Adams and Klickitat County, Washington, and the ascades and northern Sierra Nevada of California; not reported from Oregon.
Habitat: Sandy and gravelly flats in sagebrush and open pine forests on basalt.
Origin: Native
Flowers: July
var. suksdorfii – ames milk-vetch
Astragalus purshiiPursh's milk-vetch, woollypod milk-vetch
Distribution: East of the Cascades in Washington; British Columbia to California, east to the Dakotas and New Mexico.
Habitat: Prairies and sagebrush deserts, foothills and lower mountains.
Origin: Native
Flowers: April-June
var. glareosus – woolly-pod milk-vetch
var. purshii – woolly-pod milk-vetch
var. tinctus – woolly-pod milk-vetch
Astragalus reventiformisYakima milk-vetch
Distribution: East of the Cascades in Washington; Washington south to Sherman County in Oregon.
Habitat: Shrub-steppe to low, dry open forests.
Origin: Native
Flowers: April-June
Astragalus reventuslongleaf milk-vetch, Blue Mt.milk-vetch
Distribution: Occurring east of the Cascades crest in Washington; Washington south to northeastern Oregon.
Habitat: Forest openings at low to moderate elevations.
Origin: Native
Flowers: April-June
Astragalus ripariusPiper's milk-vetch
Distribution: Along the Snake River from the Clearwater to the Tucannon River, Whitman and Columbia Counties, WA, and in Nex Perce County, ID.
Habitat: Dry bluffs and canyon banks.
Origin: Native
Flowers: May - June
Astragalus robbinsiiRobbins's milk-vetch
Distribution: Alaska and British Columbia south on the east side of the Cascades to Okanogan County, Washington,east to Alberta and south in the Rockies to Colorado.
Habitat: Stream banks and alpine slopes.
Origin: Native
Flowers: June - August
var. minor – Robbin's milk-vetch
Astragalus sclerocarpusstalked-pod milk-vetch, woody-pod milk-vetch
Distribution: Along the Okanogan and Columbia Rivers from north of Kettle Falls to The Dalles
Habitat: Dunes and sandy barrens, low elevation
Origin: Native
Flowers: June
Astragalus sheldoniiSheldon's milk-vetch
Distribution: Occurring in the southeastern part of Washington; Washington south to Oregon, east to Idaho.
Habitat: Shrub-steppe and Ponderosa pine forest openings.
Origin: Native
Flowers: April-June
Astragalus sinuatuswhited milk-vetch
Distribution: Along Colockum Creek, south of Wenatchee in Chelan County, Washington.
Habitat: Among sagebrush on rocky hillsides.
Origin: Native
Flowers: May
Astragalus spaldingiiSpalding's milk-vetch
Distribution: East of the Cascades, central Washington to northeast Oregon, east to western Idaho.
Habitat: Sagebrush and grasslands in the foothills and valleys.
Origin: Native
Flowers: May - June
Astragalus speirocarpuscurve-pod milk-vetch, medic milk-vetch, spiral-pod milk-vetch
Distribution: Endemic to Washington from Kittitas County east to Grant County, south Klickitat County.
Habitat: Sagebrush desert.
Origin: Native
Flowers: April-May
Astragalus succumbenscrouching milk-vetch, sprawling milk-vetch
Distribution: Occurring east of the Cascades crest in Washington from Kittitas and Grant counties south; Washington south to Umatilla and Gilliam Counties, Oregon.
Habitat: Sagebrush deserts, sandy barrens and lower foothills.
Origin: Native
Flowers: April-June
Astragalus tenelluspulse milkvetch
Origin: Native
Astragalus tweedyiTweedy's milk-vetch
Distribution: Yakima County, Washington, south to north-central Oregon near the olumbia dn lower Deschutes Rivers
Habitat: Sagebrush plains and foothills
Origin: Native
Flowers: May - June
Astragalus whitneyiballoon milk-vetch
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: High, open, rocky ridges and slopes, often in serpentine.
Origin: Native
Flowers: May-August
var. sonneanus – balloon milk-vetch