Flora of North America species comparison

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

prostrate to ascending, 2–7 cm underground, strigulose-cinereous.

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.

reduced to phyllodia or terminally expanded rachis, 2.5–13 cm;

stipules distinct throughout, 2–7 mm, papery at proximal nodes, firm at distal nodes;

leaflets (1 or)3–7, blades linear-filiform or linear-involute, continuous with rachis, 3–17 mm, apex acute, surfaces strigulose.

(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–)7–20(–35)-flowered, flowers declined or nodding;

axis 2–18(–33) cm in fruit;

bracts 1.2–2.6 mm;

bracteoles 0 or 2.

narrowly ascending or incurved, 0.2–4 cm.

ascending, 3.5–7.5 cm.

0.7–3.2 mm.

2–8 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.

8–9 mm;

calyx campanulate, 4.6–6 mm, strigulose, tube 3.8–4.1 mm, lobes subulate or triangular-subulate, 0.8–1.9 mm;

corolla ochroleucous, immaculate;

banner recurved through 100–130°;

keel 8 mm, apex bluntly triangular.

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.

declined or pendulous, stramineous, straight or nearly so, narrowly lanceoloid-oblong, strongly laterally compressed, 25–40 × 4–5.5 mm, papery, strigulose;

sessile.

3–9.

14–18.

= 16, 24.