Lathyrus
peavine, sweet-pea, vetchling
18 species
8 subspecies and varieties
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Lathyrus angulatusangled peavine
Origin: Introduced
Lathyrus aphacayellow vetchling
Distribution: Known only from the San Juan Islands in Washington; Washington south to California, and in scattered locations in central and southern U.S.
Habitat: Disturbed ground.
Origin: Introduced
Flowers: May-July
Lathyrus holochlorusthin-leaf vetchling
Distribution: Occurring west of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Fence rows and partially cleared land.
Origin: Native
Flowers: May-July
Lathyrus japonicusbeach pea
Distribution: Coastal in Washington; Alaska south to California; also along the Atlantic Coast.
Habitat: Sandy beaches, dunes, and headlands along the coast.
Origin: Native
Flowers: May-September
Lathyrus lanszwertiiNevada peavine, thick-leaved peavine
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
var. aridus – pinewoods peavine
var. bijugatus – drypark pea
var. lanszwertii – thick-leaved peavine
Lathyrus latifoliuseverlasting-pea
Distribution: Occurring in locations throughout much of Washington; widespread in North America.
Habitat: Found in a variety of disturbed habitats, usually where somewhat moist.
Origin: Introduced
Flowers: May-July
Lathyrus littoralisbeach peavine, silky beach vetchling
Distribution: Occurring in the coastal counties in Washington; British Columbia south to California.
Habitat: Sand dunes and sandy beaches.
Origin: Native
Flowers: May-July
Lathyrus nevadensisSierra peavine
Distribution: Occurring on both sides of the Cascades crest and in the southeast corner of the State; British Columbia south to California, east to Idaho.
Habitat: Open woods at moderate to mid-elevations.
Origin: Native
Flowers: May-July
var. cusickii – Cusick's pea
var. nevadensis – Sierra pea
Lathyrus ochroleucuscream pea
Distribution: Occurring east of the Cascades crest along the northern border in Washington; Alaska south to Washington, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Moist woods, at the edge of thickets.
Origin: Native
Flowers: May-July
Lathyrus palustrismarsh pea
Distribution: Occurring along the Puget Sound and outer coast in Washington; widely distributed throughout most of North America except the Rocky Mountain and southeastern regions of the U.S.
Habitat: Chiefly in tidelands along the coast.
Origin: Native
Flowers: April-July
Lathyrus pauciflorusfew-flowered peavine
Distribution: Occurring chiefly east of the Cascades crest in Washington;, Washington, south to California, east to Idaho and Arizona.
Habitat: Shrub-steppe to Ponderosa pine and higher open forests.
Origin: Native
Flowers: April-June
var. pauciflorus – few-flowered pea
Lathyrus polyphyllusleafy pea
Distribution: Occurring west of the Cascades crest in lowland Washington, and east up the Columbia River Gorge; Washington south to California.
Habitat: Prairies and open areas of low mountains.
Origin: Native
Flowers: May-July
Lathyrus pratensismeadow vetchling
Origin: Native
Flowers: May - July
Lathyrus sphaericusgrass pea
Origin: Introduced
Flowers: May - June
Lathyrus sylvestrisnarrow-leaf pea
Distribution: Occurring chiefly west of the Cascades in Washington.
Habitat: Roadsides and waste places at low elevations.
Origin: Introduced
Flowers: May-July
Lathyrus torreyiTorrey's pea
Distribution: Occurring west of the Cascades crest in Washington; Washington south to California.
Habitat: Open prairies and clearings in the woods at low elevations.
Origin: Native
Flowers: May-July
Lathyrus tuberosusearth-nut pea
Origin: Introduced
Flowers: May - July
Lathyrus vestitus
Origin: Native
Flowers: April - June
var. ochropetalus – Pacific peavine