Flora of North America species comparison

erect, branched.

prostrate or creeping, branched, rooting at nodes.

palmate;

stipules ovate-lanceolate, 1–1.5 cm, margins entire, sometimes ciliate, apex acuminate;

petiole 1–13 cm;

petiolules 0.5 mm;

leaflets 3, blades elliptic to oblong or obovate, 0.8–3.5 × 0.5–1.5 cm, base cuneate, veins thickened, margins serrate proximally, obscurely denticulate distally, apex usually rounded or retuse, rarely acute, surfaces glabrous.

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, 10–30-flowered, ovoid to subglobose, 0.7–2.2 × 0.5–2 cm;

involucres a narrow rim, 0.5 mm, membranous, dentate.

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.

2.5–12 cm.

3–17 cm.

erect becoming reflexed, 0.5–6 mm;

bracteoles linear or cup-shaped, to 1 mm.

straight, to 0.5 mm;

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

6–13 mm;

calyx broadly campanulate, 5–11 mm, glabrous, veins 10, tube 1–5 mm, lobes unequal, elliptic to linear, margins hyaline, dentate or pectinate, ciliate, sinuses narrow, orifice open;

corolla white, pink, or purple, 5–13 mm, banner broadly ovate, 6–13 × 4–7 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.

short-stipitate, ovoid, 5–10 mm.

ovoid, 2.5–3 mm, long-beaked.

1 or 2, brown, mottled, ovoid, 2.5–3 mm, smooth.

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

= 16.

= 16.