Flora of North America species comparison

erect to ascending, branched.

usually erect, ascending, or prostrate, branched.

pinnate;

stipules ovate-lanceolate, 0.5–0.8 cm, margins entire, glandular, apex acuminate;

petiole 0.3–2 cm;

lateral leaflet petiolules 0.5–0.6 mm, terminal leaflet stalk 3–5 mm;

leaflets 3, blades rhombic to obovate, 0.4–1.5 × 0.4–0.8 cm, base cuneate, lateral veins prominent, ± parallel, ascending, margins denticulate distally, apex truncate or retuse, surfaces strigose adaxially.

palmate;

stipules lanceolate or ovate, 0.3–1 cm, margins lacerate, apex acute to acuminate;

petiole 1–9 cm;

petiolules to 0.8 mm;

leaflets 3, blades elliptic, obovate, oblanceolate, or obcordate, 0.2–5 × 0.1–1.2 cm, base cuneate, veins thickened, margins denticulate, apex acute or retuse, surfaces glabrous.

axillary, 30–60-flowered, globose or broadly ovoid, 0.8–1.5 × 0.7–1 cm;

involucres absent.

terminal or axillary, 1–20+-flowered, subglobose or globose, 0.5–1.3 × 0.1–1 cm;

involucres flat, 2–6 mm, incised 1/2 their length, lobes 2–7, lacerate.

1.5–3.5 cm.

0.5–5 cm.

reflexed, 0.7–1.2 mm;

bracteoles a fringe of red setae.

straight, to 0.5 mm;

bracteoles absent.

4.3–5 mm;

calyx campanulate, strongly bilabiate, 1.3–1.5 mm, glabrous, veins 5, tube 0.3–0.6 mm, lobes unequal, adaxial deltate, very short, lateral and abaxial linear-subulate, each tipped with 1 or 2 stiff hairs, orifice open;

corolla yellow becoming brown, 3.5–6 mm, ribbed, banner persistent, obovate, enveloping other petals, boat-shaped, 4.3–5 × 2.8–3.2 mm, apex broad, acute.

5–11 mm;

calyx campanulate, not slit between adaxial lobes, 1.9–2.4 mm, glabrous, veins 10–20, tube 1.5–4 mm, lobes subequal, narrowly triangular, margins usually entire, rarely with a small lateral tooth, orifice open;

corolla purple, usually white-tipped, 3–10 mm, banner obovate, 3–10 × 0.6–2.6 mm, apex emarginate.

stipitate, oblong, 2–2.5 mm.

oblong or ellipsoid, 2–4 mm.

1 or 2, yellow, ellipsoid, 1–1.5 mm, smooth, lustrous.

2, blackish brown, sometimes mottled, ovoid or ellipsoid, 1–1.6 mm, smooth.

= 14.

= 16.