Flora of North America species comparison

stipules connate-sheathing at proximal nodes, distinct at distal nodes;

leaflets 7–11, blades to 2–5 mm, surfaces strigulose adaxially (often densely so);

terminal leaflet not jointed to slightly dilated rachis.

stipules connate at proximal nodes, usually distinct at distal nodes;

leaflets 9–15(or 17), blade surfaces glabrous adaxially;

terminal leaflet jointed or continuous with rachis.

calyx 3–3.6 × 2.2–2.5 mm;

corolla ochroleucous, fading yellowish;

banner 9–10 mm.

calyx 3.2–4.4 × 2.3–2.8 mm;

corolla usually pale purple, tinged purplish, or with maculate keel tip, rarely all concolorous;

banner 12–15.5 mm.

purple-mottled, obliquely ovoid, bladdery-inflated, 20–25 mm, (1–)1.2–2.2 mm wide when pressed;

stipe 3 mm.

faintly mottled, semi-ovoid or semi-ellipsoid, 20–35 mm, 6–12 mm wide when pressed;

stipe (4–)5–8 mm.

17–20.

10–16.