Flora of North America species comparison

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

erect or ascending, 4–24 cm underground and cream to stramineous, strigulose-pilose.

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.

unifoliolate distally, reduced to phyllodia, 1.5–6.5(–8) cm;

stipules 10–25 mm, firm, papery at proximal nodes, foliaceous at distal nodes;

leaflet blades (when present), decurrent, closely folded, linear to narrowly oblong, 2–17 mm, apex acute to obtuse, surfaces silvery-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.

8–45-flowered;

axis 2–28 cm in fruit;

bracts 2.5–7 mm;

bracteoles 0–2.

erect, 2.5–13 cm.

ascending or erect, 3.5–18 cm.

0.8–4(–4.8) mm.

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.

12–19 mm;

calyx 7.2–10.9 mm, pilosulous, tube 4.2–6.6 mm, lobes lanceolate-subulate, 2.7–6 mm;

corolla pink to red-purple with pale or white wing tips;

keel 9.4–14.3 mm.

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.

dehiscent on plant, stramineous, straight to hamately incurved, 14–24 × 2.5–4.8 mm, stiffly papery, strigulose.

42–71(–76).