Flora of North America species comparison

1–10+, decumbent to ascending or erect, branched sparsely, stiff, leafy, base without persistent leaves.

1–10+, erect or decumbent, branched, woody, leafy.

palmate, homomorphic;

stipules ovate;

sessile;

rachis absent;

leaflets (2–)4–6, blades linear-oblanceolate to oblanceolate, apex acute to obtuse, surfaces villous to strigose.

irregularly pinnate;

stipules glandlike; short-petiolate to petiolate;

rachis 3–10 mm, not flattened;

leaflets 3–5, blades narrowly obovate to elliptic or oblong, apex acute to obtuse, surfaces sparsely to densely strigose.

(1 or)2–5(or 6)-flowered.

(3–)7–12-flowered.

ascending to deflexed, curved to erect, (10–)20–50(–80) mm, longer than leaves;

bract 1–3-foliolate, subtending umbel.

ascending, 2–10 mm, shorter than leaves;

bract absent or unifoliolate, subtending umbel.

8–15 mm;

calyx 5–7.5 mm, tube villous, lobes subulate;

corolla yellow with red-backed banner, often suffused with red, turning orange, claws shorter than calyx tube, banner recurved ca. 45°, pandurate, wings longer than keel (nearly equaling banner);

style straight, glabrous.

8–12 mm;

calyx 4–6 mm, tube sparsely strigose to glabrate, lobes short-subulate to deltate;

corolla yellow, claws ± longer than calyx tube, banner implicate-ascending to 90°, wings ± equaling keel;

style abruptly incurved 90°, glabrous.

persistent, exserted, spreading or deflexed, reddish to grayish brown, ± straight, turgid, not constricted, incompletely septate, linear-oblong, (14–)25–35 × 1.5–3.5 mm, leathery, apex short-beaked, dehiscent, smooth, lustrous, margins keeled, strigillose or glabrous.

persistent, exserted, divergent to declined, brown, straight or curved, turgid, slightly constricted, not septate, linear-oblong, 10–50 × 1–2 mm, leathery, apex tapering, long-beaked, indehiscent, ± veined, margins thickened, smooth, glabrate or sparsely strigose.

(1–)3–6, olive green to dark brown, mottled, oblong, smooth.

1–4(–6), brown (paler veined), not mottled, cylindric, smooth.