Page authors: Don Knoke, David Giblin
Acmispon parviflorus
small-flowered bird's-foot trefoil

Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.

Habitat: Open slopes and sandy flats, seashore into the mountains.

Flowers: April-September

Origin: Native

Conservation Status: Not of concern


Mostly glabrous annual, the stems 1-3 dm. long, erect to prostrate, often branched, especially at the base.


Leaves odd-pinnate; leaflets 3-5, oblong to oblong-obovate, 5-12 mm. long and 2-3 mm. broad, entire; stipules gland-like.


Peduncles axillary, 3-20 mm. long, with a single bract of 2 or 3 leaflets just below the single flower; calyx 2 mm. long, the 5 linear-lanceolate lobes shorter than the tube; corolla pea-like, 4-5 mm. long, pale yellow, usually reddish-tinged.


Pod 15-30 mm. long and 1.5-2.5 mm. broad, restricted between the 4-8 seeds.

Accepted Name:
Acmispon parviflorus (Benth.) D.D. Sokoloff
Publication: Annales Botanici Fennici 37(2): 129. 2000. 2000.

Synonyms & Misapplications:
Hosackia parviflora Benth.
Lotus micranthus Benth. [HC]
Additional Resources:

PNW Herbaria: Specimen records of Acmispon parviflorus in the Consortium of Pacific Northwest Herbaria database.

WA Flora Checklist: Acmispon parviflorus checklist entry.

E-Flora BC: Acmispon parviflorus atlas page.

CalPhotos: Acmispon parviflorus photos.

USDA Plants: Acmispon parviflorus information.

33 photographs:
Group by