Flora of North America species comparison

herbaceous, erect or spreading, much branched, to 6 dm, glabrous, puberulent, or densely hispid.

herbaceous, erect, branched from near base, to 5 dm, often minutely pubescent along one side, sometimes glabrous, rarely pubescent throughout.

stipular sheath 8–15-veined, glabrous or puberulent to densely hispid, teeth of distal stipules mostly shorter than sheath;

petiole 1–3 mm;

leaflet blades ovate to elliptic or lanceolate, 40–20 mm, veins 3–6 pairs, base cuneate, margins sometimes spinulose, apex acute to acuminate, surfaces sometimes punctate abaxially, glabrous.

stipular sheath 7-veined, glabrous or puberulent, teeth of distal stipules mostly longer than sheath;

petiole 2–4 mm;

leaflet blades lanceolate to ovate, 150 × 80 mm, veins 3–5 pairs, base cuneate, margins rarely ciliate, apex acute to acuminate, surfaces glabrous.

1–8-flowered, ovoid, to 1 cm, axis rudiment absent;

bracts usually 1-foliolate, sometimes 3-foliolate proximally, 3–6 × 2.5–5.5 mm, 5–9-veined, puberulent to densely hispid;

outer bracteole 2–3 mm, apex glabrous or ciliate;

inner bracteole 1, 1–2.5 mm, apex glabrous or ciliate.

2+-flowered, narrowly oblong or ovoid, to 1.5 cm, axis rudiment present, to 5 mm;

bracts 1-foliolate, averaging 4 mm wide, 5–7-veined, margins ciliate and often bristly abaxially;

outer bracteole 1–3 mm, apex ciliate;

inner bracteoles 2, 2–2.5 mm, apex ciliate.

calyx tube 2.5–5 mm, lobes ± acute;

corolla yellow or orange-yellow;

banner suborbiculate, 4.5–7 mm;

wings 3.5–4.5 mm;

keel 3–4 mm.

calyx tube 3–4 mm, lobes acute;

corolla yellow;

banner obovate, 4.5–6 mm;

wings 4–5 mm;

keel 3.5–4.5 mm.

1–1.5 mm.

1–2 mm.

strongly reticulate with vertical veins, 2.5–3 mm wide;

fertile segment 1;

proximal segment sterile;

distal segment 2.5–5 mm, puberulent;

beak hooked, 0.5–1 mm, to 1/5 distal segment.

conspicuously reticulate, 1.5–2 mm wide;

fertile segments (1 or)2;

proximal segment 2–2.5 mm;

distal segment 2.5–3 mm, usually densely white-hairy, sometimes glabrate;

beak straight or slightly curved, 1.5–2.5 mm, 1/2 to equaling distal segment, with short, white hairs or glabrous.

= 20.