Shrubs. Branches divaricate; sterile shoots almost sharp-tipped. Stems 4–10(–15) dm, densely gland-dotted when young, silky-pilosulous, hairs retrorse. Leaves pinnate, 0.7–2.7 cm; leaflets 7–13, blades obovate to suborbiculate, 1–4.5 mm, terminal leaflet shorter than laterals, surfaces with submarginal and apical glands abaxially, glands visible, pubescent. Racemes dense to relatively loose; rachis not spine-tipped in anthesis, 0.3–3 cm; bracts lanceolate or linear-lanceolate, 1.6–6.5 mm; bracteoles absent. Flowers: calyx 3.9–5.3(–8.3) mm, pilosulous throughout or tube glabrous, tube 1.9–2.8(–3) mm, ribs prominent, intervals each with 1 row of 2–6 glands, lobes triangular-lanceolate to lanceolate, abaxial lobe longer; corolla pink-purple, banner with yellow eye; banner 4.6–6.1(–6.6) mm, ovate-cordate, ovate, base cordate, apex emarginate, claw linear; wings oblong, 4–5(–5.4) × 1.5–2.1 mm; keel obovate, (3.7–)4–5.3 × 2.4–3.7 mm; stamens 5.2–6.8 mm; filaments distinct to (1.5–)2–3 mm; anthers (0.5–)0.6–0.8(–1) mm, connective gland-tipped. Legumes obliquely obovoid, 2.5 mm, with large glands distally, glabrous proximally, sparsely pilosulous distally. Seeds 2–2.5 mm.

Distribution

sw United States.

Discussion

Varieties 2 (2 in the flora).

Selected References

None.

Lower Taxa

Psorothamnus polydenius var. jonesii, Psorothamnus polydenius var. polydenius

Key

1	Calyx lobes 1.8–2.5 mm.	Psorothamnus polydenius var. polydenius
1	Calyx lobes 3.6–5.2 mm.	Psorothamnus polydenius var. jonesii