familyFabaceae
subfamilyFabaceae subfam. Faboideae
genusTrifolium
speciesTrifolium plumosum
subspeciesTrifolium plumosum subsp. plumosum
Trifolium plumosum subsp. plumosum
Endemic
Treatment appears in FNA Volume 11.
Herbs 20–35 cm. Leaflet blades linear, 0.1–0.7 cm wide, those of basal leaves 0.2–0.5(–0.7) cm wide, apex acuminate.
Phenology: Flowering May–Jul.
Habitat: Dry rocky hillsides, clay roadsides, fields, open pine forests.
Elevation: 500–1500 m.
Discussion
Subspecies plumosum is restricted to northeastern Oregon and southeastern Washington.
Selected References
None.
Lower Taxa
None.