Flora of North America species comparison

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

several, decumbent or sprawling to erect, (1–)2–6(–8) cm underground, strigulose.

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.

4–16 cm;

stipules strongly decurrent, 3–11 mm, papery at proximal nodes, subherbaceous at distal nodes;

leaflets (5–)11–23, blades ovate to oblong, obovate, or oblanceolate, 6–24 mm, apex obtuse to retuse, surfaces strigose to sparsely so abaxially, strigose or glabrous adaxially.

(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.

10–30-flowered, flowers ascending to declined;

axis 3–14 cm in fruit;

bracts 2–6 mm;

bracteoles 0–2.

narrowly ascending or incurved, 0.2–4 cm.

incurved-ascending, subhorizontal in fruit, 2.5–13(–24) cm.

0.7–3.2 mm.

1–3.5 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.

(11–)13–17 mm;

calyx short-cylindric, 5.2–7.8 mm, black-pilosulous, tube 4.5–6.5 mm, lobes subulate, 1.2–2.5 mm;

corolla purplish to pink-purple, wing tips pale to white;

keel 10.5–10.8 mm.

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.

firmly attached to receptacle, falling while still attached to pedicel, ascending to descending (sometimes humistrate), green and red-tinged becoming brownish, incurved 0.5 spiral, narrowly oblong, subterete, laterally compressed when pressed, sides convex, elliptic in cross section, dorsal suture forming a prominent ridge, 15–32 × 4–7(–8) mm, bilocular, thick becoming leathery, strigose to strigulose;

stipe 0.5–2 mm.

3–9.

24–36.

= 16, 24.