Flora of North America species comparison

decumbent to ascending, glabrous or sparsely strigulose.

ascending to erect, flexuous, diffusely interbranched, 6–16 cm underground, proximalmost epigeous internodes the shortest, clumps to 1+ m wide, strigulose.

4–9.5 cm;

stipules 2–5 mm, submembranous becoming papery;

leaflets 7–15(or 17), blades ovate, ovate-oblong, or obovate-cuneate, 5–20 mm, apex retuse, surfaces sparsely strigulose abaxially, glabrous adaxially.

1.5–6.5 cm, unifoliolate throughout or distally, terminal leaflet slightly expanded and confluent with filiform rachis;

stipules distinct throughout, 1–5 mm, membranous becoming papery at proximal nodes, herbaceous at distal nodes;

leaflets (1 or)3–9, blades linear-oblong to linear-elliptic or linear, 2–11 mm, apex acute, surfaces strigose;

terminal leaflet decurrent distally, not jointed to rachis.

5–20-flowered;

axis 1–4.5 cm in fruit;

bracts 0.8–2 mm;

bracteoles 0.

3–17-flowered, flowers ascending;

axis 5–40(–42) cm in fruit;

bracts 0.5–1.1 mm;

bracteoles 0.

incurved-ascending, 3–9 cm.

incurved-ascending, 6–19 cm.

0.5–1.2 mm.

1.5–5.5 mm.

7–9 mm;

calyx 3.2–4.6 mm, strigulose, tube 2–2.9 mm, lobes subulate, 1–1.7 mm;

corolla whitish, sometimes faintly tinged lilac;

banner recurved through 45°;

keel 4.8–5.5 mm.

8–10.5 mm;

calyx campanulate, 2.5–4.6 mm, strigose, tube 1.5–3.7 mm, lobes triangular, 0.5–1.9 mm;

corolla pink-purple;

banner recurved through 50°;

keel 7.4 mm, apex obtuse to subacute, not beaklike.

pendulous, stramineous or brown, lunate, linear-ellipsoid, 3-sided compressed, 10–17 × 2.5–3.5 mm, papery, glabrous;

septum 1.3–2 mm wide;

stipe 1–1.5 mm.

pendulous, stramineous, straight or decurved, narrowly ellipsoid, dorsiventrally or laterally compressed or subterete, 17–28 × 3.8 mm, papery, strigose or glabrous;

stipe 2.5–5 mm.

8–10.

10–12.