Flora of North America species comparison

erect or ascending, unbranched or densely dichotomously branched.

erect or ascending, branched from base.

palmate;

stipules ovate or lanceolate, 1–3 cm, margins entire or toothed, apex usually acuminate, sometimes 2-fid;

petiole 3–15 cm;

petiolules 1–1.5 mm;

leaflets 3, blades broadly obovate, orbiculate, or rhombic-obovate, 0.8–4 × 0.7–3 cm, base broadly cuneate, veins obscure, thickened near leaflet margin, margins remotely dentate to densely serrulate-dentate, apex rounded or slightly retuse, surfaces glabrous or glabrate.

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.

terminal or axillary, 10–30-flowered, subglobose or globose, 1–4 × 1–4 cm;

involucres broadly bowl-shaped, 4–15 mm, lobes 3–8, lanceolate, acuminate, undivided or 2- or 3-fid.

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

involucres absent.

3–13 cm.

0.8–2 cm.

straight, 1 mm;

bracteoles distinct or connate, broadly ovate, 1 mm.

absent;

bracteoles absent.

10–27 mm;

calyx campanulate, 3–8 mm, glabrous, veins 10, tube 1.5–2.5 mm, lobes 5–10, unequal, undivided or 3-fid, long-acuminate, orifice open;

corolla creamy white to yellow, pink to purple in age, keel petals rarely dark purple, 10–27 mm, banner broadly ovate, inflated in fruit, not distally twisted, 10–27 × 6–15 mm, apex rounded, erose.

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, linear, 7–8 mm.

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

3–8, gray, mottled, globose, 1.6–2 mm, reticulate.

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

= 16.

= 16.