The Rocky Mountain states and all states to the west
Meadows, streambanks, coniferous woodland, open slopes, from 4,000 to 11,000 feet
Alternate, stalked, palmately divided into three elliptic to oblanceolate leaflets, up to 2 inches long, with finely toothed margins
Trifolium longipes is a widespread species across much the West, absent only from desert regions and most of Nevada; it inhabits a range of habitats and elevations so is variable in characteristics, and 11 subspecies are recognized, mostly occupying different regions; distinguishing characteristics include petal color, petal shape, calyx hairiness and leaflet shape (width:length ratio).
The trifoliate leaflets have a prominent pattern of pinnate veins, and a sparse strigose hair covering underneath; upper surfaces are hairless. Leaves grow at the base and (usually) along the stem, though some varieties are stemless. The spherical inflorescence is attached by a hairy, relatively long peduncle, up to 3 inches, and it contains between five and 16 flowers, attached by very short pedicels. Calyces are deeply divided into narrow, linear, bristle-like lobes, (usually) strigose hairy. Corollas are about twice as long as the calyces (up to 0.6 inches) and are white to pink/purple in color, withering to brown.