Flora of North America species comparison

very short, densely tufted, branched.

erect, branched distally, emerging from ground stout, red.

cauline, densely tufted or crowded near base;

free blades of stipules reduced, 1 mm;

petiole 0.4–1.5 cm;

leaflets (3 or)5, blades 2–7 × 1–1.5 mm, adaxial surface villous.

cauline;

stipules 6–20 mm;

petiole 1–7 cm;

leaflets 6–8(–10), blades (15–)38–61 × 8–13 mm, adaxial surface green, ± puberulent to short-villous.

flowers solitary or paired, axillary.

15–20 cm;

flowers not whorled.

1.5–4 mm;

bracts persistent, 1 mm.

3–9 cm;

bracts ± persistent, 7–14 mm (conspicuously longer than buds).

1 mm.

2–6 mm.

4–5 mm;

calyx 2.5–3 mm, abaxial lobe shallowly cleft, 2–2.5 mm, adaxial lobe 2-toothed, 0.5–1 mm;

corolla banner white, wings and keel purplish, keel glabrous.

8–14 mm;

calyx bulge or spur 0–1 mm, abaxial lobe 3-toothed, 6–10 mm, adaxial lobe notched, 7–9 mm;

corolla pale yellow, banner glabrous abaxially, keel upcurved, glabrous.

0.6–1 cm, pilose.

2.5–5 cm, hairy.

persistent, disclike, sessile.

deciduous, petiolate.

1 or 2.

3–6.