Flora of North America species comparison

erect to prostrate, branched from base.

erect, unbranched or sparsely branched.

pinnate;

stipules ovate, 0.3–0.5 cm, margins entire, apex acute;

petiole to 1.5 cm;

lateral leaflet petiolules to 0.5 mm, terminal leaflet stalk 1–1.5 mm;

leaflets 3, blades obovate to elliptic-lanceolate, 1–2 × 0.5–1.5 cm, base cuneate, lateral veins prominent, ± parallel, ascending, margins dentate distally, apex rounded or retuse, surfaces glabrous or sparsely hairy.

palmate;

stipules ovate, 1–2 cm, margins wavy or toothed, apex blunt or ± tapering distally;

petiole 1–8 cm;

petiolules 1 mm;

leaflets 3, blades broadly ovate, 1–3 × 1–1.5 cm, base cuneate, veins fine, margins denticulate, apex emarginate or retuse, surfaces with spreading, pustulate-based hairs.

axillary or terminal, 5–20-flowered, ovoid or globose, 0.5–0.9 × 0.6 cm;

involucres absent.

terminal, 25–100-flowered, oblong, 2–7 × 1–2.5 cm;

involucres absent.

1–1.5 cm.

2–10 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

straight, 0.5 mm;

bracteoles absent.

2.8–3.5 mm;

calyx campanulate, 1.5–2 mm, glabrous, veins 5, tube 0.8–1 mm, lobes unequal, longer than tube, adaxial 2 shorter, orifice open;

corolla pale yellow becoming brown, 2.6–3.2 mm, not or slightly ribbed, banner persistent, spatulate, 2.6–3.2 × 2 mm, apex rounded to broadly acute.

10–15 mm;

calyx tubular-campanulate, 10 mm, villous, veins 10, tube 3–4 mm, lobes equal, longer than tube, spreading in fruit, orifice narrowly opening;

corolla usually scarlet to red, rarely pink or white, 11–17 mm, banner oblong-elliptic, much longer than wing and keel petals, 10–16 × 2 mm, apex acute.

stipitate, ellipsoid, 1.5–2 mm, short beaked.

ovoid, leathery distally, transversely dehiscent, 2.5–3 mm.

1, yellow or pale brown, ellipsoid, 0.9–1 mm, smooth, glossy.

1, reddish, ellipsoid, 2–2.5 mm, smooth, glossy.

= 16, 28, 32.

= 14.