Flora of North America species comparison

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

single or to 3, prostrate to ascending or erect, 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.

(1.5–)2–10.5(–12) cm;

stipules distinct, 1.5–4 mm, thinly herbaceous or submembranous;

leaflets (3–)7–13, blades linear, linear-oblong, oblanceolate, or linear-elliptic, rarely obcordate, 3–18 mm, apex obtuse to retuse, surfaces strigose abaxially, strigose or glabrous adaxially.

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

axis (2–)2.5–12(–17) cm in fruit;

bracts 1–3 mm.

2–8-flowered, flowers ascending;

axis 0.3–1.5 cm in fruit;

bracts 0.7–2 mm;

bracteoles 0–2.

erect, 2.5–13 cm.

incurved-ascending, 0.6–2.5 cm.

0.8–4(–4.8) mm.

0.6–1.5 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.

5–7.6 mm;

calyx campanulate, (2–)2.7–3.8(–4) mm, strigose, tube 1.5–2.5 mm, lobes subulate to lanceolate, 0.6–1.5 mm;

corolla whitish, suffused with purple, or pink-purple;

banner recurved through 45°;

keel 3.8–4.8 mm, apex obtuse, 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.

spreading to declined, green or suffused purple, becoming stramineous, straight or slightly incurved, obliquely ovoid, bladdery-inflated, 15–24 × 6–12 mm, unilocular or semibilocular, thin becoming papery, strigose, hairs straight, appressed;

seed-bearing flange 0.2–1.5 mm wide.

42–71(–76).

7–18.