Flora of North America species comparison

usually green, rarely subcinereous, villosulous or loosely strigulose, hairs to 0.5–0.8(–1) mm.

often (not consistently) cinereous, strigulose, hairs to 0.2–0.4(–0.6) mm (when 0.4–0.6 mm, then legumes distinctly inflated).

decumbent or prostrate with ascending tips.

diffuse or ascending.

(13–)19–27(–31).

(11 or)13–25.

usually ascending, spreading, or declined, rarely prostrate (in fruit).

incurved-ascending to suberect.

purple or reddish violet.

bright or pale purple, or tipped with white, or suffused with purple.

humistrate, narrowly oblong-ellipsoid, oblanceoloid-ellipsoid, or subclavately ellipsoid, not distinctly inflated, (12–)13–24(–27) × (3–)4–7(–8.5) mm, glabrous or sparsely strigulose;

stipe 1–2 mm.

not or seldom humistrate, obliquely ovoid or obovoid, rarely broadly ellipsoid, usually distinctly inflated, 13–27 × 6–12 mm, usually strigulose, rarely villosulous;

stipe 0–4.5 mm.

20–30.

(24–)28–34.

= 22.