Flora of North America species comparison

1–20+, procumbent or decumbent to ascending, branched basally, herbaceous, slender, leafy.

1–30+, usually erect to spreading, rarely procumbent, branched basally, herbaceous, slender, striate, sometimes ± woody, remotely leafy, usually deciduous mid-season, foliage developing after rain.

irregularly pinnate;

stipules glandlike;

subsessile;

rachis 3–20 mm, flattened;

leaflets 4–10, blades unequal, obovate to oblanceolate to linear-oblong or oblong, apex acute to obtuse or truncate, surfaces ± densely tomentose to glabrate.

± pinnate (distally 3-foliolate);

stipules glandlike;

subsessile to petiolate;

rachis 2–8(–10) mm, not flattened;

leaflets 3–6(or 7), blades elliptic to lanceolate, apex acute, surfaces strigillose to glabrate.

1–3-flowered.

(1 or)2–7-flowered, in axil of distal leaves, spaced or congested.

ascending or reflexed, upturned, 3–25 mm, shorter to longer than leaves (often elongated in fruit);

bract absent or 1–3-foliolate, usually subtending umbel.

ascending, 0–2 mm, shorter than leaves;

bract absent.

(5–)6–10(–12) mm;

calyx 3–5.5 mm, tube ± sparsely strigillose or glabrous, lobes subulate;

corolla yellow (sometimes banner orangish abaxially), turning orange or reddish, claws ± equaling calyx tube, banner implicate-ascending or remaining closely implicate, wings longer than keel;

style corneously thickened, marked by color, straight, puberulent or glabrous.

7–12 mm;

calyx 2.5–5 mm, tube usually glabrous, sometimes sparsely strigillose, lobes short-subulate;

corolla yellow, turning orange or red, claws slightly longer than calyx tube, banner implicate-ascending to 90°, wings shorter than or equaling keel;

style curved, glabrous.

persistent, exserted, erect or divergent, brown, straight to ± curved distally, compressed, not or slightly constricted, incompletely septate, linear-oblong, 10–35 × 2–3 mm, thinly leathery, apex initially short-beaked, dehiscent, smooth, margins smooth, thin, glabrous or ± strigose.

persistent, much exserted, divergent or pendent, greenish to reddish brown, curved to ± straight, turgid, slightly constricted, not septate, linear-oblong, 10–15 × 1–2 mm, leathery, apex long-beaked, indehiscent, smooth, margins thickened, smooth, strigillose or glabrate.

5–10, greenish to brown, ± mottled, ovoid to cuboid or globose, rugulose or granular.

(1 or)2, olive to brown, not mottled, elongate-oblong, smooth.