Flora of North America species comparison

erect to prostrate, branched from base.

erect, unbranched or profusely 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 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, 5–20-flowered, ovoid or globose, 0.5–0.9 × 0.6 cm;

involucres absent.

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

involucres absent.

1–1.5 cm.

2–5 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

reflexed, 0.3–0.6 mm;

bracteoles a fringe of red setae.

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.

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, ellipsoid, 1.5–2 mm, short beaked.

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

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

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

= 16, 28, 32.

= 14, 16.