Flora of North America species comparison

± erect, loosely cespitose, branched.

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

basal and cauline, palmate;

stipules ovate, 1.1–1.5 cm, margins entire, apex acuminate-subulate;

petiole 5–15 cm;

petiolules absent;

leaflets 3, blades lanceolate to linear, 2–4 × 0.1–0.6 cm, base cuneate, veins prominent, margins remotely serrate, apex acute, surfaces glabrous.

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 axillary, 10–18-flowered, ellipsoid to subglobose, 1.8–2.2 × 2.3–2.5 cm, rachis prolonged beyond flowers, undivided or forked, often bearing sterile flower buds distally;

involucres absent.

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

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

7–16 cm, slightly twisted apically.

2–15 cm.

strongly reflexed in fruit, 0.5 mm;

bracteoles minute.

straight, 0.5 mm;

bracteoles absent.

13–15 mm;

calyx tubular-campanulate, 6–8.5 mm, glabrous, veins 10, tube 2–2.5 mm, lobes unequal, triangular-subulate, orifice open;

corolla pink to purple, 15 mm, banner oblong, 14–16 × 6–7 mm, apex acute or apiculate.

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.

ellipsoid, 5 mm.

stipitate, ovoid, 3.3–3.5 mm.

1 or 2, brown, flattened ovoid, 2 mm, smooth.

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