Flora of North America species comparison

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

erect or ascending, finely 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.

compound proximally, unifoliolate or reduced to phyllodia distally, sometimes unifoliolate throughout, 2.5–9 cm;

stipules connate-sheathing and papery-scarious at proximal nodes, connate or distinct and herbaceous with scarious margins becoming papery at distal nodes, 1.2–7 mm;

leaflets (0 or 1–)3–9, blades linear to linear-elliptic, 10–28 mm, apex obtuse to acute, surfaces strigose;

terminal leaflet decurrent, not jointed to rachis.

(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.

3–15-flowered, flowers ascending-spreading;

axis 0.5–6 cm in fruit;

bracts 1.2–2 mm;

bracteoles 1 or 2.

narrowly ascending or incurved, 0.2–4 cm.

erect, 7–21 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.

18–22 mm;

calyx 6.4–9.6 mm, strigulose, tube 5.6–6.7 × 2.8–5.2 mm, lobes triangular-subulate, 0.9–2.9 mm;

corolla usually pink-purple with white wing tips, rarely white throughout;

keel 12–16 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.

deflexed or declined, stramineous, straight or slightly incurved, narrowly oblong, laterally compressed, bicarinate by sutures, (15–)20–35 × 4.4–6(–7) mm, thinly fleshy becoming stiffly papery, terminal cusp 0.5–1 mm, strigose to glabrate;

sessile or subsessile.

3–9.

19–29.

= 16, 24.

= 22.