Flora of North America species comparison

prostrate or decumbent, 0–7 cm underground, hirsute.

erect or ascending, usually strigulose, rarely glabrous.

(1.5–)3–10(–12) cm;

stipules rarely connate at proximal nodes, 2–8.5 mm, mostly thinly herbaceous, sometimes papery at proximal nodes;

leaflets (3–)7–15, blades thin, obovate, broadly oblanceolate, or suborbiculate, (2–)5–22 mm, larger ones pinnately veined, apex cuneate to emarginate, surfaces villous-pilose abaxially, glabrous adaxially.

distally unifoliolate or reduced to phyllodia, 2–10 cm;

stipules connate-sheathing and papery-scarious at proximal nodes, distinct and herbaceous at distal nodes, 1.5–6.5 mm;

leaflets (0 or 1–)3–13, blades linear-filiform to oblong, 3–30 mm, margins involute, apex obtuse to acute, surfaces strigose abaxially, strigose or glabrous adaxially;

terminal leaflet of compound leaves sometimes decurrent distally, not jointed to rachis.

densely (5–)8–24-flowered;

axis 1–3(–4) cm in fruit;

bracts (2–)2.5–5 mm;

bracteoles 0.

7–35-flowered, flowers ascending;

axis 3–30 cm in fruit;

bracts 1–3 mm;

bracteoles 0–2.

incurved-ascending, (2–)3–11 cm.

strict, 6–25 cm.

0.7–2.5 mm.

0.8–3.5 mm.

8.8–11.2 mm;

calyx 5.5–7.8(–8.2) mm, pilose, tube 2.7–3.7 mm, lobes lanceolate to lanceolate-attenuate, (2.7–)3–4.5(–5) mm;

corolla pale yellow to greenish ochroleucous, fading yellowish, keel immaculate;

banner recurved through 50–80°;

keel 7.2–9.7 mm, apex narrowly deltate, acute or subacute, often beaklike.

(13–)14–20 mm;

calyx 4.6–8 mm, strigose, tube 4.1–6.4 × (2.6–)3–3.9 mm, lobes subulate, 0.5–2 mm;

corolla pink-purple and wing tips white, or greenish yellow or whitish;

keel (9.5–)10.5–13.5 mm.

ascending or spreading (humistrate), pale yellow green becoming stramineous then brownish, incurved or ± straight, slenderly lunate-ellipsoid or semi-ellipsoid, bluntly 3-sided compressed, (15–)17–25 × (2.8–)3.2–5.2 mm, subunilocular, thinly fleshy becoming stiffly papery, densely hirsute, hairs spreading-ascending, to 1.2–1.8 mm, lustrous white;

gynophore to 0.8 mm.

erect, green sometimes purple-mottled becoming stramineous, straight or slightly incurved, oblong, slightly compressed laterally, bicarinate, 13–25 × 3.7–9 mm, stiffly leathery to somewhat woody, glabrous or strigose;

sessile.

12–18.

14–26.