Herbage strigulose, hairs basi­fixed. Stems 10–35 cm. Leaves 4–15(–17.5) cm; leaflets (9 or)11–19(or 21), blades narrowly elliptic to linear or linear-oblanceolate, (2–)4–30(–40) mm, apex acute or obtuse, surfaces pubescent abax­ially, glabrous adaxially. Racemes loosely (3–)6–16(–24)-flowered; axis (1.5–)2.5–14 cm in fruit. Flowers: calyx 3–4.2 mm, tube 2.3–3.1 mm, lobes 0.7–1.3 mm; corolla whitish or suffused or veined purple, keel pinkish lilac; banner 7–9.5 mm; keel 6–7.8(–8.4) mm. Legumes linear-oblong, 13–18(–21) × 2–2.8(–3.2) mm, glabrous or strigulose. Seeds 7–10. 2n = 22.

Phenology: Flowering May–Aug.
Habitat: Banks, flats, rocky or grassy slopes, glades in pine forests.
Elevation: 200–2000 m.

Distribution

• Generated Map
• Legacy Map

Alta., B.C., Idaho, Mont., Wash.

Discussion

Variety serotinus is known from the Columbia Basin in Washington, northward into British Columbia and Rocky Mountains of Alberta, and southward into northwestern Montana.

D. Isely (1998) noted that var. serotinus is contiguous, and blends, with the purple-petaled var. miser. If origin is unknown, var. serotinus is often distinguished from var. hylophilus with difficulty.

Selected References

None.

Lower Taxa

None.