Flora of North America species comparison

erect to prostrate, branched from base.

erect, branched from base.

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 elliptic-ovate, 0.6–1 cm, margins entire, toothed, or remotely lobed, ciliate, apex acuminate;

petiole 0.5–7 cm;

petiolules 1 mm;

leaflets 3, blades obovate or elliptic, 0.5–2 × 0.2–1 cm, base cuneate, veins obscure or slightly thickened, margins serrate, apex acute or obtuse, often retuse, surfaces pubescent.

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

involucres absent.

axillary or terminal, 25–50-flowered, ovoid-ellipsoid, 1–1.8 × 0.8–1.5 cm;

involucres absent.

1–1.5 cm.

0.5–10 cm.

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.

6–9 mm;

calyx campanulate, 6–8 mm, densely pubescent, veins 10 (additional faint veins sometimes present), tube 1–2 mm, lobes unequal, narrowly triangular, subulate, sinuses rounded, lobes divergent, orifice open;

corolla white with purple tips, 4–6 mm, banner narrowly elliptic, 6–7 × 2 mm, apex acute, slightly erose.

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

broadly ellipsoid, 2.8–3.2 mm.

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

1 (or 2), yellow or brown, often red-mottled, ellipsoid, 2–2.6 mm, smooth, glossy.

= 16, 28, 32.

= 16.