Flora of North America species comparison

erect to ascending, branched.

decumbent or ascending, 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 to ovate, 0.4–1.8 cm, margins lacerate, apex acute to acuminate;

petiole 0.5–6 cm;

petiolules to 1 mm;

leaflets 3, blades broadly elliptic to broadly obovate, 0.4–2.5 × 0.4–1.5 cm, base cuneate, veins moderately thickened, margins dentate-serrulate, apex rounded or truncate, often retuse, surfaces glabrous.

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

involucres absent.

axillary, 10–25-flowered, subglobose or globose, 1–1.8 × 1–1.8 cm;

involucres flattened or bowl-shaped, 4–7 mm, incised 1/2 their length, when folded, not hiding flowers except proximally, lobes 5–12, dentate-lacerate, spinulose.

1.5–3.5 cm.

1–2 cm.

reflexed, 0.7–1.2 mm;

bracteoles a fringe of red setae.

straight, to 1 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.

8–10 mm;

calyx campanulate-tubular, not slit between adaxial lobes, 5–7 mm, glabrous, veins 20, tube 1.9–2.4 mm, lobes unequal, 3-fid or laciniate, often appearing 7+-lobed, orifice open;

corolla pink or pale purple, 8–9 mm, banner elliptic, 8–9 × 2–3 mm, apex retuse.

stipitate, oblong, 2–2.5 mm.

ellipsoid, 3.5–4 mm.

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

2, dark brown, mottled, ovoid or reniform, 1.7–1.9 mm, smooth.

= 14.