Flora of North America species comparison

erect to prostrate, branched from base.

ascending, erect, or procumbent, 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 or ovate, 0.5–1.8 cm, margins entire, apex acuminate-filiform;

petiole 0.5–20 cm;

petiolules to 1 mm;

leaflets 3, blades obovate, ovate, elliptic, or rhombic, 1–3 × 0.5–3 cm, base cuneate, veins moderately prominent, margins spinulose-dentate, apex rounded or broadly acute, surfaces hairy abaxially, glabrous adaxially.

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

involucres absent.

axillary, 15–30-flowered, subglobose to globose, flowers resupinate, forming stellate-spreading clusters in fruit, 0.5–1.6 × 0.8–1.5 cm;

involucres a narrow rim, 0.2 mm.

1–1.5 cm.

1–6 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

slightly reflexed, to 0.5 mm;

bracteoles minute or 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.

5–6 mm;

calyx tubular-campanulate, inflated in fruit, markedly asymmetric-bilabiate, slit between adaxial lobes, 2.5–3 mm, 8–11 mm in fruit, hairy, short-hairy or glabrescent in fruit, veins 10, connected by lateral veins, tube 2 mm, 7–9 mm in fruit, lobes green, erect, unequal, triangular, divergent, linear-lanceolate, unequal in fruit, orifice open;

corolla pink to purple, 5–8 mm, banner oblong, 5–8 × 2 mm, apex emarginate to crenulate.

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

lenticular, 1.8–2.2 mm.

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

1, ovoid, dark purple, olive green, yellow, or reddish brown, 1.5–1.9 mm, smooth, dull.

= 16, 28, 32.

= 14, 16, 32.