Plants usually 8–26+ cm, glandular. Leaves 2–21 cm; leaflets (19–)25–39+. Peduncles 4–27 cm, often some sur­passing leaves, axis often (1.5–)4–19 cm in fruit, pubes­cent. Racemes 3–19+-flowered, subcapitate to elon­gate. Calyces 7–10.5 mm, tube 4–7 mm, lobes (1–)1.5–3.5(–4.5) mm, prominently tuberculate. Corollas pink-purple, lilac, whitish, or yellowish, keel tips maculate or not, 11–16 mm; wing blades not especially dilated distally. Legumes (8–)12–21(–30) × (4–)5–7 mm.

Phenology: Flowering spring–summer.
Habitat: Gravel bars, roadsides, ridge crests, talus slopes, pinyon-juniper slopes, sage­brush, boreal forest, tundra communities.
Elevation: 0–3900 m.

Distribution

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Alta., B.C., N.W.T., Nunavut, Ont., Que., Yukon, Alaska, Calif., Colo., Idaho, Minn., Mont., Nev., Oreg., Utah, Wash., Wyo.

Discussion

Variety viscida is quite variable, with numerous sub­units held together by tenuous characteristics that are difficult to define or place in a key. Variation is often great in populations from adjacent hillsides or on a single gravel bar, especially in the Arctic. Dwarf plants far removed from the range of var. hudsonica are similar to that entity; the inflorescences become capitate, and the calyx lobes are often relatively very short. Further study might reveal the need for additional segregation. The Pan-Arctic Flora (http://panarcticflora.org/) recognizes O. glutinosa and O. viscida as distinct species.

Selected References

None.

Lower Taxa

None.