Flora of North America species comparison

erect to ascending, branched.

erect-ascending, flexuous, often zigzag, 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-linear, 1.8–2.8 cm, margins entire, ciliate, apex subulate;

petiole 1–9 cm;

petiolules 1 mm;

leaflets 3, blades elliptic-oblong, obovate, or ovate, 1.5–5 × 0.8–3.5 cm, base cuneate, veins arcuate, forked, margins entire, finely ciliate, apex obtuse to acute, surfaces appressed-pubescent.

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

involucres absent.

terminal or axillary, rarely paired, 20–50-flowered, globose or ovoid, 1.5–4 × 1.3–3.8 cm;

involucres absent.

1.5–3.5 cm.

1–3 cm.

reflexed, 0.7–1.2 mm;

bracteoles a fringe of red setae.

straight, 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.

15–18 mm;

calyx cylindric, 6–10 mm, glabrous, veins 10–15, tube 2.5–3.5 mm, lobes unequal, subulate-setaceous, orifice glabrous or hairy distally, closed;

corolla usually reddish purple, rarely white, 12–20 mm, banner lanceolate-elliptic, 1.2–2 × 4–5 mm, apex acute.

stipitate, oblong, 2–2.5 mm.

ovoid to globose, leathery distally, transversely dehiscent, 2–3 mm.

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

1 or 2, yellow-brown, mitten-shaped, 1–1.5 mm, smooth, lustrous.

= 14.

= 48, 64, 68, 70, 72, 80, ca. 126.