Flora of North America species comparison

erect or ascending, branched.

prostrate to ascending, branched.

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;

stipules lanceolate-ovate, 0.7–1.3 cm, margins entire, apex acuminate;

petiole 1–8.5 cm;

petiolules 1–1.5 mm;

leaflets 3, blades oblanceolate or obovate, 0.5–2.9 × 0.4–1.3 cm, base cuneate, veins prominent, margins denticulate to spinulose, apex usually rounded or truncate, sometimes retuse, surfaces glabrous.

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

involucres absent.

axillary or terminal, 10–20-flowered, obconic, globose, or subglobose, 1.7–2.5 × 1.–1.5 cm;

involucres broadly campanulate, 6–8 mm, incised ± 3/4 their length, lobes 15–20, linear-lanceolate, entire, acuminate.

1–12 cm.

4–6 cm.

absent;

bracteoles lanceolate, 6–7 mm, acuminate.

erect to slightly reflexed, 1–2 mm;

bracteoles ovate, 0.5 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.

10–16 mm;

calyx campanulate, 6–10 mm, glabrous, veins 10, tube 2–2.3 mm, lobes ± equal, subulate, 3–5 mm, orifice open;

corolla white to pale purple, keel petals with dark purple-red tips, 11–13 mm, banner oblong, 11–13 × 4–5 mm, apex retuse.

ellipsoid, 2.5–2.5 mm, shorter than calyx.

short-stipitate, oblong, 3.5–5 mm.

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

1 or 2, olive-brown, mottled purple, oblong, 1.5 mm, smooth, semiglossy.

= 16.

= 16.