Flora of North America species comparison

erect, branched.

erect or ascending, cespitose, much-branched.

palmate;

stipules ovate to lanceolate, 0.8–1.5 cm, margins entire or slightly serrate, apex acicular;

petiole 1–7 cm;

petiolules to 0.5 mm;

leaflets 3, blades narrowly obcordate, obovate, oblanceolate, or linear, 1–2.5 × 0.3–0.7 cm, base cuneate, veins moderately thickened, margins serrate distally or entire, apex rounded, truncate, shallowly to deeply retuse, or deeply 2-fid, surfaces glabrous or hairy abaxially along midvein.

palmate;

stipules oblanceolate, 0.5–1.4 cm, margins entire, apex acute-acuminate;

petiole 0.5–4 cm;

petiolules to 0.1 mm;

leaflets 3, blades oblanceolate, often folded, 0.4–1.5 × 0.2–0.4 cm, base cuneate, veins obscure, margins subentire to denticulate distally, apex acute, mucronulate, surfaces villous.

axillary or terminal, 5–30-flowered, globose to subglobose, 0.8–1.5 × 0.8–1.5 cm, rachis prolonged beyond flowers;

involucres a very narrow rim, to 0.5 mm.

terminal, usually formed of 2 sessile heads, 15–25-flowered, globose, 0.8–2 × 0.6–1.5 cm;

involucres absent, distal stipules and leaves sometimes forming involucrelike structure.

3–8 cm.

between distal leaves or involucrelike structure and inflorescences 0.5–6 cm.

reflexed in fruit, 1–3 mm;

bracteoles broadly triangular, membranous, to 0.5 mm.

straight, (0–)1–2 mm;

bracteoles broadly ovate, truncate, membranous, to 0.5 mm.

6–8 mm;

calyx campanulate, 3–3.6 mm, slightly hairy or glabrous, veins 10, tube 1–1.5 mm, lobes unequal, subulate, margins green or purple, orifice open;

corolla pink or purple, 5–7 mm, banner elliptic to oblong, 5–7 × 3–4 mm, apex rounded, apiculate.

10–15 mm;

calyx tubular-campanulate, 6–9 mm, rough-hairy or glabrous, veins 10, tube 3–6 mm, lobes subequal, subulate, orifice open;

corolla light purple, 10–15 mm, banner oblong, 9–13 × 3–4 mm, apex rounded or truncate;

ovaries pubescent distally.

stipitate, obovoid, 3–4 mm.

ellipsoid, 4–5 mm.

1 or 2, brown, mottled, oblong, 2–3 mm, smooth.

1 or 2, brown, ovoid, 1.5–2 mm, smooth.

= 16.