Distribution: Occurring west of the Cascades crest in lowland Washington, and east up the Columbia River Gorge; Washington to California.
Habitat: Prairies and open areas of low mountains.
Flowers: May-July
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bumblebees, bees, butterflies
[none provided]
PNW Herbaria: Specimen records of Lathyrus polyphyllus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Lathyrus polyphyllus checklist entry
OregonFlora: Lathyrus polyphyllus information
E-Flora BC: Lathyrus polyphyllus atlas page
CalPhotos: Lathyrus polyphyllus photos