Flora of North America species comparison

erect to prostrate, branched from base.

decumbent, 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 broadly ovate, 1.3–1.7 cm, margins entire or faintly denticulate, apex acuminate;

petiole 7–17 cm (distalmost 6–8 cm);

petiolules 1–1.5 mm;

leaflets 3, blades ovate or orbiculate, 0.8–3.5 × 0.5–1.9 cm, base cuneate, veins fine, margins dentate to denticulate, apex rounded or obcordate, surfaces glabrous.

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

involucres absent.

terminal, 20–50-flowered, globose becoming subglobose or hemispheric, 1.2–2.5 × 1.8–2.7 cm;

involucres a narrow rim.

1–1.5 cm.

2.2–2.5 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

reflexed in fruit, 5–7 mm;

bracteoles broadly ovate, membranous, to 0.5 mm, truncate.

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.

9–11 mm;

calyx campanulate, 3–5 mm, sparsely pubescent or glabrous, veins 10, tube 1–2 mm, lobes equal, narrowly triangular to subulate, 2–3.7 mm, orifice open;

corolla white, 9–10 mm, banner ovate-oblong, 9–10 × 6–8 mm, apex rounded or retuse.

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

oblong, 3–4 mm.

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

2–4, yellow to brown, purple-mottled, globose, 1.2–1.5 mm, slightly rugose.

= 16, 28, 32.