Flora of North America species comparison

erect to prostrate, branched from base.

erect 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 obliquely ovate, 0.4–1.2 cm, margins entire or slightly serrate, apex acuminate;

petiole 1–5 cm;

petiolules 0.5 mm;

leaflets 3, blades oblanceolate, obovate, or obcordate, 0.4–1.7 × 0.3–1.1 cm, base cuneate, veins fine or slightly thickened, margins setose, often dentate distally, apex usually retuse, rarely rounded, surfaces villous.

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

involucres absent.

axillary or terminal, 10–40-flowered, globose, 0.5–1.3 × 0.4–1.2 cm;

involucres flattened or bowl-shaped, 0.4–1 cm, when folded, nearly completely hiding calyces, villous, incised 1/2 their length, lobes 5–12, lanceolate-ovate, entire or slightly toothed proximally, acuminate.

1–1.5 cm.

1–8 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.

4–6 mm;

calyx campanulate-tubular, 3–5.5 mm, pubescent, veins 10, tube 1.8–2.5 mm, lobes ± equal, triangular-aristate, margins hyaline, wavy, orifice open;

corolla white or pink to lavender, 4–6 mm, banner oblong, 3–6 × 1–2 mm, apex emarginate.

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

broadly ellipsoid, 1.5–2 mm.

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

1, yellow, reddish mottled, oblong, 1.5 mm, smooth.

= 16, 28, 32.

= 16.