Flora of North America species comparison

erect to prostrate, branched from base.

procumbent, decumbent, or 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 ovate, 1–1.5 cm, margins entire, apex subulate-setaceous;

petiole 0–7 cm;

petiolules to 0.5 mm;

leaflets 3, blades obovate or obcordate, 0.6–1.5 × 0.4–1 cm, base cuneate, veins thickened distally, margins spinulose-serrate, apex retuse or rounded, surfaces glabrous.

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

involucres absent.

axillary, 30+-flowered, globose, 0.8–1 × 0.8–1 cm;

involucres absent.

1–1.5 cm.

absent or to 0.1 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

straight, to 0.2 mm;

bracteoles linear, to 0.5 mm.

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.

6–8.5 mm;

calyx tubular-obconic, 3–4 mm, glabrous, veins 10–12, tube 1.5–2 mm, lobes equal, triangular-ovate, spreading to recurved in fruit, orifice open;

corolla pink, 6–8 mm, banner obovate, 6–8 × 1–2 mm, apex acute.

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

obovoid, 2–3 mm.

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

2, brown, reniform, 1 mm, tuberculate.

= 16, 28, 32.

= 14, 16.