[Deervetch, Birdsfoot-trefoil and Lotus: The Genera Acmispon, Hosackia and Lotus East of the Cascade Mts. of Oregon and Washington]

American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover

Acmispon americanus var. americanus

Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus

Flower of American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus)

A close-up of the flower of american bird's-foot trefoil as seen along Soda Springs Road in the Klickitat State Wildlife Area....................June 28, 2009.

Flower of American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus) -- Sideview of flower of American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus)

Frontal and profile views of the flower of american bird's-foot trefoil as seen along Soda Springs Road in the Klickitat State Wildlife Area.......June 28, 2009.

Leaf of American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus)

Leaflets of american bird's-foot trefoil as seen along Soda Springs Road in the Klickitat State Wildlife Area........June 28, 2009.

American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus) - American Bird's-foot Trefoil, Pursh's Lotus, Spanish-clover: Acmispon americanus var. americanus (Synonyms: Hosackia americana, Lotus americanus, Lotus purshiana, Lotus purshianus var. glaber, Lotus purshianus var. glabra, Lotus purshiana var. purshiana, Lotus unifoliolatus, Lotus unifoliolatus var. unifoliolotus)

American bird's-foot trefoil as seen on Missoula Flood sandbars between Five Mile and the Little Spokane River, Spokane County, WA........July 4, 2018.
Paul Slichter