Flora of North America species comparison

erect to prostrate, branched from base.

erect or ascending, branched from base.

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-lanceolate, 0.4–0.8 cm, margins entire, apex acuminate, flared outward;

petiole 0.5–6 cm;

petiolules 1+ mm;

leaflets 3, blades obovate, elliptic, or narrowly elliptic, 0.8–2.5 × 0.4–1.6 cm, base cuneate, veins prominent, thickened abaxially, margins denticulate or serrate, apex rounded, acute, or apiculate, surfaces sparsely hairy.

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

involucres absent.

terminal and axillary, 15–50-flowered, obconic or obovoid, 1–2 × 1–1.6 cm;

involucres absent.

1–1.5 cm.

0.8–2 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.

9–11 mm;

calyx campanulate, 5–8 mm, glabrescent, veins 10, tube 2–3 mm, lobes unequal, triangular-elliptic, stellate-spreading, orifice closed by bilabiate callosities;

corolla creamy white, 8–10 mm, banner oblong-spatulate, 8–10 × 2–3 mm, apex acute.

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

obovoid, leathery distally, transversely dehiscent, 1.6–2 mm.

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

1, tan or brown, ovoid, 1.2–1.4 mm, smooth, glossy.

= 16, 28, 32.

= 16.