Flora of North America species comparison

usually erect or ascending, sometimes decumbent, rarely prostrate, usually sparsely strigulose, sometimes pilosulous.

prostrate or decumbent to ascending, villous.

2–9 cm;

stipules connate-sheathing and papery at proximal nodes, connate or distinct and herbaceous or submembranous at distal nodes, usually black or blackish when dry, 1.5–7 mm;

leaflets 11–21, blades narrowly oblong to elliptic, linear, oblanceolate, or obovate, 3–24 mm, apex acute to obtuse, mucronate, or emarginate, surfaces sparsely strigose abaxially, glabrous adaxially.

2.5–13 cm;

stipules distinct, 2.5–7 mm, herbaceous becoming membranous;

leaflets (9–)15–25(–29), blades narrowly elliptic to oblanceolate, 4–16 mm, apex obtuse to acute, surfaces villous or villous-pilose.

(1–)3–23-flowered, often paired in leaf axils, flowers ascending;

axis 0.5–11 cm in fruit;

bracts 0.5–2.7 mm;

bracteoles 0–2.

(6–)12–30-flowered, flowers spreading;

axis (1–)1.5–5(–7) cm in fruit;

bracts 1.5–4.5 mm;

bracteoles 0.

narrowly ascending or incurved, 0.2–4 cm.

erect or incurved-ascending, 3–10 cm.

0.7–3.2 mm.

0.2–0.8 mm.

6–9(–11) mm;

calyx 2.6–5.2 mm, strigose, tube 2–2.7 mm, lobes subulate, 0.7–2.5 mm;

corolla usually white to ochroleucous, sometimes pink-purple;

banner recurved through 40°;

keel 4.3–5.7(–6.5) mm.

7–11(–11.7) mm;

calyx campanulate, (5–)5.6–8.3 mm, villous or villous-tomentose, tube (2.5–)3.1–4.5 × (2.4–)2.6–3.6 mm, lobes narrowly subulate, (2.4–)2.6–3.6 mm, somewhat accrescent, covering most or all of mature legume;

corolla whitish, often tinged lavender, immaculate or keel tip maculate, drying ochroleucous;

banner recurved through 50°;

keel 5.2–7.4 mm, apex obtuse, sometimes obscurely beaklike.

pendulous, green, often brown- or red-mottled, becoming brown or black, straight or curved, ellipsoid to oblong, laterally flattened, 7–16 × 2.5–4.5 mm, papery, usually glabrous, sometimes strigose;

stipe 0.6–6 mm.

spreading to ascending, straight, obliquely ovoid, somewhat laterally compressed, (3.5–)4–6 × 2.5–3.5 mm, stiffly papery, densely villous-tomentulose, hairs 1+ mm.

3–9.

4–10.

= 16, 24.

= 24.