Flora of North America species comparison

decumbent, trailing, erect, or ascending, mostly strigulose or villosulous, often glabrous or glabrate at proximal nodes.

erect and ascending; densely strigulose.

5–16(–18) cm;

stipules distinct 1.5–6.5 mm, papery at proximal nodes, firm or submembranous at distal nodes;

leaflets (11 or)13–25, blades ovate, obovate, oblong-elliptic, elliptic, lanceolate-oblong, oblanceolate, or linear-oblong, 5–25(–30) mm, apex usually obtuse, retuse, or truncate and apiculate, rarely subacute, surfaces glabrous.

distalmost unifoliolate, sometimes also proximalmost, 3–8 cm;

stipules usually distinct throughout, rarely shortly connate-sheathing at proximal nodes, 1.5–9.5 mm, firm, early becoming papery;

leaflets (1 or)3–7, blades elliptic to narrowly oblanceolate, 10–47 × 2–9(–13) mm, apex obtuse to retuse, surfaces strigose;

terminal leaflet decurrent, not jointed to rachis.

(10–)12–30(–35)-flowered, flowers subhorizontal or ascending;

axis (2–)2.5–12(–17) cm in fruit;

bracts 1–3 mm.

7–30-flowered, flowers spreading-declined;

axis 2–11 cm in fruit;

bracts 1–2.5 mm;

bracteoles 0–2.

erect, 2.5–13 cm.

erect and incurved-ascending, 2.5–15.5 cm.

0.8–4(–4.8) mm.

1.2–3 mm.

(6.4–)7.8–13 mm;

calyx campanulate or ovoid-campanulate, 4–6.6 mm, strigulose, tube (2.5–)2.6–4.3 mm, lobes subulate, deltate, or triangular, 0.7–2.6 mm;

corolla ochroleucous, yellowish, or greenish white;

banner abruptly recurved through 60–90°, (6.4–)7.8–13 mm;

keel (6.2–)7.1–10.8 mm, apex narrowly deltate and triangular, subacute, somewhat beaklike.

(16–)20–24 mm;

calyx light brown, cylindric-gibbous, (7–)8.2–11(–12) mm, strigose, tube (5.5–)6.5–9.2 mm, lobes subulate, 1.7–2.6(–4) mm;

corolla ochroleucous, concolorous;

banner recurved through 45°;

keel 13.7–16.6 mm, apex bluntly or sharply deltate.

spreading or ascending (sometimes humistrate), pale green, sometimes purple-tinged or -speckled, becoming stramineous, obliquely ovoid, semi-ovoid or semi-ellipsoid, bladdery-inflated, somewhat obcompressed, 25–60 × 12–32 mm, beak prominent, papery, ± lustrous, usually strigulose, rarely glabrescent.

pendulous, brown, straight, ellipsoid, dorsiventrally compressed, sometimes becoming subterete, 25–35 × 4–7.5 mm, papery, strigose;

stipe 8–12 mm.

42–71(–76).

16–22.