Flora of North America species comparison

erect to prostrate, branched from base.

curved-ascending, 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-ovate, 0.8–1.8 cm, margins entire, apex long-setaceous;

petiole 0.5–5 cm;

petiolules 0.5 mm;

leaflets 3, blades obovate to oblong, 0.8–2.5 × 0.5–1.3 cm, base cuneate, veins prominent, closely-spaced, margins denticulate distally, apex rounded, surfaces densely spreading-hairy.

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

involucres absent.

terminal on branches, 10–50-flowered, globose or ovoid, disarticulating in fruit, 1.5–2.5 × 1.5–2.5 cm;

involucres absent, involucrelike structures formed by enlarged stipules.

1–1.5 cm.

absent.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

absent;

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.

10–17 mm;

calyx campanulate, 7–11 mm, pilose, veins 20, tube 2–5 mm, lobes subequal, abaxial slightly longer, orifice hairy, open;

corolla purplish red, 10–14 mm, banner lanceolate, 10–14 × 1–2 mm, apex acute-acuminate.

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

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

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

1, tan or brown, globose-ellipsoid, 1.5–2 mm, smooth, glossy.

= 16, 28, 32.

= 10.