Flora of North America species comparison

erect, unbranched or profusely branched.

palmate;

stipules oblanceolate, 0.9–1.5 cm, margins entire, apex acuminate or cuspidate;

petiole 0.8–1 cm;

petiolules 0–1 mm;

leaflets 3, blades obovate to elliptic-lanceolate, 1–2.8 × 0.6–0.8 cm, base cuneate, lateral veins prominent, ± parallel, ascending, margins denticulate, apex acute, truncate, or retuse, mucronate, surfaces glabrous or sparsely hairy.

axillary or terminal, 20–80-flowered, usually ovoid-cylindric, sometimes globose, 1.2–2 × 1.3 cm;

involucres absent.

2–5 cm.

reflexed, 0.3–0.6 mm;

bracteoles a fringe of red setae.

7–8 mm;

calyx campanulate, 2–2.5 mm, glabrous, veins 5, tube 0.8–1 mm, lobes unequal, adaxial deltate, 0.6–0.9 mm, 1/2 length of abaxial, abaxial linear, orifice open;

corolla golden yellow becoming brown, 5–6 mm, banner persistent, obovate, boat-shaped, 4–4.5 × 2.4–2.6 mm, apex emarginate.

stipitate, oblong, 3–3.5 mm, longer than calyx.

1, pale yellow-green, ovoid, 1–1.2 mm, smooth, glossy.

= 14, 16.