Flora of North America species comparison

erect to prostrate, branched from base.

prostrate to 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 lanceolate-ovate, 0.7–1.3 cm, margins entire, apex acuminate;

petiole 1–8.5 cm;

petiolules 1–1.5 mm;

leaflets 3, blades oblanceolate or obovate, 0.5–2.9 × 0.4–1.3 cm, base cuneate, veins prominent, margins denticulate to spinulose, apex usually rounded or truncate, sometimes retuse, surfaces glabrous.

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

involucres absent.

axillary or terminal, 10–20-flowered, obconic, globose, or subglobose, 1.7–2.5 × 1.–1.5 cm;

involucres broadly campanulate, 6–8 mm, incised ± 3/4 their length, lobes 15–20, linear-lanceolate, entire, acuminate.

1–1.5 cm.

4–6 cm.

reflexed, 0.2–0.5 mm;

bracteoles a fringe of red setae.

erect to slightly reflexed, 1–2 mm;

bracteoles ovate, 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.

10–16 mm;

calyx campanulate, 6–10 mm, glabrous, veins 10, tube 2–2.3 mm, lobes ± equal, subulate, 3–5 mm, orifice open;

corolla white to pale purple, keel petals with dark purple-red tips, 11–13 mm, banner oblong, 11–13 × 4–5 mm, apex retuse.

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

short-stipitate, oblong, 3.5–5 mm.

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

1 or 2, olive-brown, mottled purple, oblong, 1.5 mm, smooth, semiglossy.

= 16, 28, 32.

= 16.