Flora of North America species comparison

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

single or few and clustered, sprawling to erect, 3–40+ cm underground, densely strigulose or ashen or silvery-canescent.

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.

sometimes reduced to phyllodia distally, 2–17 cm;

stipules connate-sheathing and subscarious at proximal nodes, mostly connate and herbaceous at distal nodes, 1.5–9 mm;

leaflets (0 or 1)3–13, blades narrowly oblong to filiform, 3–50(–80) mm, apex obtuse to retuse or acute, surfaces strigulose, hairs very slightly spreading;

terminal leaflet continuous with rachis distally, reduced to phyllodia.

(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.

2–15(–25)-flowered;

axis 1–8(–15) cm in fruit;

bracts 1–2.5 mm;

bracteoles 0.

narrowly ascending or incurved, 0.2–4 cm.

divaricate and incurved, 0.7–7.5 cm.

0.7–3.2 mm.

0.7–3.1 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.

6.3–10.8 mm;

calyx campanulate, 3.1–6 mm, strigose, tube 2.1–3.5 mm, lobes subulate, 1–3 mm;

corolla usually dull purplish to pink, rarely whitish;

banner abruptly recurved through 85–90°;

keel 6.4–9.1 mm, apex narrowly triangular, subacute, sometimes 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.

purple-mottled becoming purplish brown, straight or slightly curved, ellipsoid, bladdery-inflated, (10–)15–50 × 5–26 mm, papery, glabrous;

stipe 0–3.3 mm.

3–9.

12–29.

= 16, 24.