Flora of North America species comparison

erect, branched.

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 ovate-lanceolate, 0.5–1 cm, margins entire, apex acute to acuminate;

petiole 3–10 cm;

petiolules 0.5–1 mm;

leaflets 3, blades obcordate, 0.5–1.8 × 0.5–1.5 cm, base cuneate, veins thickened, margins entire or denticulate distally, apex usually deeply emarginate, rarely rounded, surfaces glabrous.

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, 5–20-flowered, globose, 1–2.2 × 1–20 cm, chasmogamous erect, cleistogamous becoming subterranean;

involucres formed of distinct, narrowly lanceolate bracts, 2.5–3.5 mm.

2.5–12 cm.

chasmogamous 6–8 cm, cleistogamous ± sessile.

erect becoming reflexed, 0.5–6 mm;

bracteoles linear or cup-shaped, to 1 mm.

reflexed in fruit, cleistogamous pushing fruit underground, chasmogamous 1–8 mm, cleistogamous 4–20 mm;

bracteoles lanceolate, 2–4 mm.

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.

chasmogamous 8–11 mm, cleistogamous 4–5 mm;

calyx campanulate, 3–5 mm, slightly pilose, veins 10, tube 1.5–2 mm, lobes subequal, adaxial pair connate proximally, sometimes nearly entire length, narrowly triangular-subulate, orifice open;

corolla magenta or pink, 7.5–11 mm, banner broadly obovate-elliptic, 5–10 × 5–8 mm, apex rounded, emarginate.

short-stipitate, ovoid, 5–10 mm.

stipitate, chasmogamous ellipsoid, cleistogamous ovoid-globose, chasmogamous longitudinally dehiscent, 3–6 mm, cleistogamous indehiscent, 3–6 mm.

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

2–6 (chasmogamous), 1–3 (cleistogamous), tan, mitten-shaped, 1.2–1.5 mm, smooth.

= 16.

= 16, 32.