Flora of North America species comparison

erect, branched.

prostrate or creeping, branched, rooting at nodes.

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 linear or lanceolate, dilated proximally, 1.3–2 cm, margins entire, apex subulate or acuminate;

petiole 1–9 cm;

petiolules 1 mm;

leaflets 3, blades ovate, obovate, or elliptic, 0.5–3 × 0.3–1.5 cm, base cuneate, veins prominent, thickened, curved, margins spinulose-denticulate, apex obtuse, often retuse, surfaces hairy abaxially, glabrous adaxially.

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.

axillary, erect or ascending, 10–30-flowered, globose, 0.8–2 × 0.8–2 cm;

involucres cup-shaped, composed of bracteoles, bracteoles lanceolate-oblong, 3–6 mm, distinct or connate proximally.

3–8 cm.

3–17 cm.

reflexed in fruit, 1–3 mm;

bracteoles broadly triangular, membranous, to 0.5 mm.

straight, to 0.5 mm;

bracteoles linear or lanceolate, 2–3 mm, acuminate or 2-fid.

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.

6–8 mm;

calyx tubular, inflated in fruit, markedly asymmetric-bilabiate, 2.5–7 mm, usually pilose to woolly, sometimes glabrescent, veins 5–10, connected by reticulating lateral veins, tube 2–7 mm, lobes unequal, abaxial equal to or longer than tube, straight, adaxial spreading in fruit, shorter than tube, very unequal in fruit, orifice open;

corolla white to pink, 5–8 mm, banner oblong-lancelate, 5–8 × 2 mm, apex emarginate to crenulate.

stipitate, obovoid, 3–4 mm.

ovoid, 2.5–3 mm, long-beaked.

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

1 or 2, tan or brown-spotted, globose-reniform, 1–1.4 mm, smooth, dull.

= 16.

= 16.