Flora of North America species comparison

erect to prostrate, branched from base.

erect-ascending, flexuous, often zigzag, 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 lanceolate-linear, 1.8–2.8 cm, margins entire, ciliate, apex subulate;

petiole 1–9 cm;

petiolules 1 mm;

leaflets 3, blades elliptic-oblong, obovate, or ovate, 1.5–5 × 0.8–3.5 cm, base cuneate, veins arcuate, forked, margins entire, finely ciliate, apex obtuse to acute, surfaces appressed-pubescent.

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

involucres absent.

terminal or axillary, rarely paired, 20–50-flowered, globose or ovoid, 1.5–4 × 1.3–3.8 cm;

involucres absent.

1–1.5 cm.

1–3 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.

15–18 mm;

calyx cylindric, 6–10 mm, glabrous, veins 10–15, tube 2.5–3.5 mm, lobes unequal, subulate-setaceous, orifice glabrous or hairy distally, closed;

corolla usually reddish purple, rarely white, 12–20 mm, banner lanceolate-elliptic, 1.2–2 × 4–5 mm, apex acute.

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

ovoid to globose, leathery distally, transversely dehiscent, 2–3 mm.

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

1 or 2, yellow-brown, mitten-shaped, 1–1.5 mm, smooth, lustrous.

= 16, 28, 32.

= 48, 64, 68, 70, 72, 80, ca. 126.