Flora of North America species comparison

prostrate to ascending, branched.

prostrate or creeping, branched, rooting at nodes.

palmate;

stipules ovate, 0.5–3 cm, margins entire or slightly toothed, ciliate, apex acute to acuminate;

petiole 1–20 cm;

petiolules 1 mm;

leaflets 3, blades broadly obcordate, 0.8–2.8 × 1–3 cm, base cuneate, veins delicate, widely spaced, margins mostly entire, slightly dentate distally, apex emarginate, surfaces appressed-sericeous.

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, elongate and reflexed, pushing into substrate after anthesis, fertile flowers 2–7, sterile flowers 0–80, globose or cylindric, 0.5–1.5 × 0.8–1.5 cm;

involucres absent.

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.

2–6.5 cm.

3–17 cm.

reflexed after anthesis, 0.2–0.4 mm;

bracteoles absent.

straight, to 0.5 mm;

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

fertile ones 7–15 mm;

calyx tubular, 5–6 mm, glabrous or hairy, veins indistinct, tube 3–4 mm, lobes subequal, pubescent or glabrous, spreading, orifice open;

corolla white, pink, or pink-striped, 7–10 mm, banner ovate-elliptic, 7–10 × 1.5–2 mm, apex rounded;

sterile flowers 4–7 mm;

calyx teeth linear;

corolla absent.

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.

subterranean, obovoid, 3–4 mm.

ovoid, 2.5–3 mm, long-beaked.

1, purplish black, ellipsoid, 2.6–3 mm, smooth, dull.

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

= 16.

= 16.