Flora of North America species comparison

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

herbaceous, ascending and spreading or prostrate and matted, much branched, to 10 dm, densely pubescent with short, viscid hairs.

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 3–5-veined, teeth of distal stipules shorter than sheath;

petiole 2.5–5 mm;

leaflet blades elliptic to lanceolate, 25 × 5 mm, viscid, veins 2–4 pairs, base cuneate, margins entire, apex acute or obtuse, surfaces punctate abaxially, short-hairy or hispidulous.

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.

2–5-flowered, ovoid, to 2 cm, axis rudiment absent;

outer bracts 3-foliolate, inner bracts 1-foliolate, sheath 5–7-veined, hispidulous and viscid abaxially;

outer bracteole 2.5–3 mm, apex ciliate;

inner bracteole 1, 2.5–3 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 3–7 mm, lobes acute;

corolla yellow;

banner suborbiculate, 4–7 mm;

wings 4–5 mm;

keel 3–4 mm.

1–1.5 mm.

1–1.5 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.

reticulate, to 2.5 mm wide;

fertile segment 1;

proximal segment sterile;

distal segment 2–4 mm, short-hairy;

beak strongly hooked, 0.5–1.5 mm, to 1/2 distal segment, often curled, short-hairy.

= 20.