Flora of North America species comparison

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

several, reclining or ascending, proximal few nodes 0.5–5 cm underground, villous-hirsutulous.

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.

2–8 cm;

stipules 3–7 mm, membranous;

leaflets 9–21, blades obovate to oblanceolate, 3–11 mm, apex obtuse or emarginate, surfaces loosely pilose abaxially, 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.

3–10-flowered, flowers ascending;

axis 0.5–2 cm in fruit, not much elongating;

bracts 2.5–4.5 mm;

bracteoles 2.

narrowly ascending or incurved, 0.2–4 cm.

incurved-ascending, reclined in fruit, 1.5–5 cm.

0.7–3.2 mm.

1.5–3 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.

14–19 mm;

calyx campanulate-cylindric, 5.8–10 mm, villosulous, tube 4.7–7 mm, lobes subulate, 1.1–3 mm;

corolla reddish violet to pink-purple;

keel 10.2–11.5(–15) 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 declined (humistrate), stramineous, incurved through 0.3 spiral, crescentic, 3-sided compressed, deltoid in cross section, dorsal suture slightly grooved, 20–45 × 5–8 mm, bilocular, scarcely fleshy becoming leathery, faces prominently reticulate, sparsely villosulous, hairs to 1 mm;

septum 3.5–4.2 mm wide;

stipe 1–2.5 mm.

3–9.

= 16, 24.