Flora of North America species comparison

erect to ascending, branched.

erect, ascending, or decumbent, unbranched or branched distally.

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-elliptic on basal leaves, triangular-ovate on distal leaves, 0.8–3 cm, margins entire, apex acute or acuminate;

petiole 1–15 cm;

petiolules 1 mm;

leaflets 3, blades ovate, rhombic, or lanceolate, 1–4.5 × 0.3–2.5 cm, thin, base cuneate, veins prominent, margins serrate, those of basal leaves setose and/or dentate, apex rounded or acute, surfaces glabrous.

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

involucres absent.

terminal or axillary, 20–40-flowered, ovoid or obovoid, 2–4 × 1.4–3.5 cm, rachis internodes between floral whorls elongated;

involucres absent.

1.5–3.5 cm.

4–15 cm.

reflexed, 0.7–1.2 mm;

bracteoles a fringe of red setae.

reflexed, to 1 mm;

bracteoles minute, blunt.

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.

14–17 mm;

calyx campanulate, 4–5.7 mm, sparsely hairy, veins 10, tube 2–3.5 mm, lobes unequal, shorter than tube, narrowly triangular, orifice open;

corolla violet or deep purple, 14–17 mm, banner ovate-oblong, 14–16 × 8–10 mm, apex rounded or slightly emarginate.

stipitate, oblong, 2–2.5 mm.

oblong or clavate, 4–5 mm.

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

1–3, brown, flattened ovoid, 2 mm, smooth or slightly roughened, dull.

= 14.