Flora of North America species comparison

erect or ascending, branched.

creeping, branched, rooting at nodes.

palmate;

stipules linear-lanceolate, 1–3.5 cm, margins entire, apex subulate or setaceous;

petiole 0.5–10 cm;

petiolules 1 mm;

leaflet 3, blades obovate to oblong, elliptic or lanceolate, 0.5–4 × 0.5–1.5 cm, base cuneate, veins prominent, thickened, margins spinulose-denticulate, apex apiculate, surfaces glabrous.

palmate, opposite or subopposite on erect stems;

stipules lanceolate (on prostrate stems) or ovate (on erect stems), 1–2 cm, margins entire or shallowly serrate, apex acuminate;

petioles 6–15 cm on prostrate stems, 0.5–4 cm on erect stems;

petiolules 1 mm;

leaflets 3, blades broadly ovate or obcordate, 1–2 × 0.5–2.5 cm, base broadly cuneate to rounded, veins fine, margins serrate, apex emarginate or rounded, surfaces glabrous.

terminal or axillary, 50–100+-flowered, globose, ovoid, or oblong, 3–6 × 2–3.5 cm;

involucres absent.

terminal, single or paired at tip of upright stem, 15–30-flowered, globose, 2–3.5 × 2–3.5 cm;

involucres absent.

1–12 cm.

2–7 cm.

absent;

bracteoles lanceolate, 6–7 mm, acuminate.

elongated and strongly reflexed in fruit, 2–5 mm;

bracteoles lanceolate, 2 mm.

12–16 mm;

calyx urceolate, not bilabiate, inflated in fruit, 6–10 mm, glabrous, veins 20–36, connected by transverse veins in fruit, tube 3–5 mm, lobes reflexed, subequal, subulate, as long as tube, orifice constricted;

corolla white becoming pink, 12–15 mm, banner ovate, broadly clawed, striate, 12–15 × 2–4 mm, apex acute-acuminate.

9–15 mm;

calyx campanulate, 4–7 mm, glabrous or sparsely pubescent, veins 10, tube 1.3–3.3 mm, lobes subequal, subulate, orifice open;

corolla white, veins often pinkish, 8–14 mm, banner ovate or oblong, 8–14 × 4–5 mm, apex rounded or emarginate.

ellipsoid, 2.5–2.5 mm, shorter than calyx.

oblong, 2.5–3 mm.

2 or 3, brown, ovoid, 1–1.5 mm, roughened.

1 or 2, tan to brown, reniform, 1.3–2 mm, smooth.

= 16.

= 16.