Herbs 2–5(–8) dm, mostly glabrous. Stems branched. Leaves cauline; leaflet blades green, flat, oblanceolate, surfaces glabrous or glabrate. Racemes several. Pedicels 3–4 mm. Flowers 5–7.5 mm, wings 5–7.5 mm; calyx bulge 0–1 mm, but not elongated into a spur; corolla blue, banner spot yellow, glabrous or hairy abaxially. 2n = 48.

Phenology: Flowering Jun–Sep.
Habitat: Wet places in spruce-aspen or lodgepole pine forests or ponderosa pine-sagebrush woodlands.
Elevation: 1500–2800 m.

Distribution

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Ariz., Idaho, Mont., S.Dak., Wyo.

Discussion

Variety parviflorus is known from southwestern Idaho, western Montana, northern Wasatch Mountains and mountainous Owyhee County in Idaho, the Black Hills in South Dakota, western Wyoming, and disjunctly on the Shivwits Plateau in northwestern Arizona (Mohave County).

The combination of small flowers, villous pedicels, and broad, green, glabrous (or nearly so) adaxial leaflet surfaces separates this variety from others of the species.

Selected References

None.

Lower Taxa

None.