Flora of North America species comparison

erect, ascending, or prostrate, branched.

erect-ascending, simple or cespitose, branched or unbranched.

palmate;

stipules ovate to oblong, 0.6–1 cm, margins entire, apex acuminate to cuspidate;

petiole 0.5–6 cm;

petiolules to 0.5 mm;

leaflets 3, blades obovate, oblanceolate, or elliptic, 0.6–1.6 × 0.3–1.2 cm, base cuneate, veins obscure or slightly thickened, margins subentire to serrate, apex rounded, retuse, surfaces pubescent.

palmate;

stipules ovate-lanceolate, 0.8–2 cm, margins toothed, apex rounded to acute;

petiole 1–9 cm;

petiolules 0.5 mm;

leaflets 3, blades elliptic to obovate, 0.5–3.2 × 0.4–1.5 cm, base cuneate, veins fine to slightly thickened, margins usually serrulate, rarely nearly lobed, teeth shortly aristate, apex usually acute or obtuse, rarely emarginate, surfaces glabrous.

terminal or subterminal, usually paired, sometimes one head slightly stalked, partially hidden by terminal leaves and stipules, 10–40-flowered, ovoid or subglobose, 0.8–2.5 × 0.5–2 cm;

involucres absent, involucrelike structure formed from terminal leaves and stipules.

axillary or terminal, 10–30-flowered, subglobose, 1.2–3 × 1.2–3 cm;

involucres widely campanulate to nearly flat, 6–11 mm.

0–0.2 cm.

2–15 cm.

absent;

bracteoles broadly ovate to linear, 1–2 mm.

straight, 0.5 mm;

bracteoles absent.

5.5–7.5 mm;

calyx tubular, 4–5 mm, pubescent, veins 5–10, tube 1.5–2 mm, lobes subequal, subulate, orifice open;

corolla usually purple or pink, rarely white, 5–7 mm, banner obovate-oblong, 6–7 × 2–3 mm, apex rounded, slightly denticulate.

10–16 mm;

calyx campanulate, inflated in fruit, 7–9 mm, sparsely pubescent, veins 5, tube 3.5–4.5 mm, lobes unequal, abaxial and lateral 2- or 3-fid, adaxial unbranched, segments plumose, apex setaceous, orifice open;

corolla yellow, 10–15 mm, banner broadly ovate, proximally inflated in fruit, distally narrowed into twisted tip, 10–15 × 3–5 mm, apex obtuse, truncate, or emarginate-apiculate.

oblong, 2.5–3 mm.

stipitate, ovoid, 3.3–3.5 mm.

1, yellow, mottled, ellipsoid, 1.6–2 mm, smooth.

1 or 2, dark brown, ellipsoid to mitten-shaped, 3.1–3.4 mm, rugose.

= 16.