Flora of North America species comparison

erect or ascending, unbranched or densely dichotomously branched.

ascending, cespitose, branched.

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.

mostly basal, palmate;

stipules ovate, 1 cm, margins entire, apex blunt;

petiole 2–6 cm;

petiolules to 1 mm;

leaflets 3, blades obovate or rhombic, 0.6–1.3 × 0.6–1 cm, base cuneate, veins prominent, margins denticulate, apex rounded or retuse, apiculate, surfaces pale abaxially, glabrous.

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 or axillary, 8–15-flowered, appearing turned to one side, obconic, 1.3–1.8 × 1.1–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally;

involucres absent.

3–13 cm.

curved distally proximal to flowers, 3–9 cm.

straight, 1 mm;

bracteoles distinct or connate, broadly ovate, 1 mm.

reflexed, 1–1.2 mm;

bracteoles minute.

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.

10–13 mm;

calyx purple, campanulate, 5–6 mm, glabrous, veins 10, tube 3.5 mm, lobes equal, subulate, 2 mm, orifice open;

corolla purple, often with white tips, 15 mm, banner obovate, 11–13 × 5–6 mm, apex flared.

stipitate, linear, 7–8 mm.

not seen.

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

not seen.

= 16.