Flora of North America species comparison

to 15 cm.

prostrate and radiating, to 15(–20) cm, internodes often concealed by stipules, strigose or strigulose.

(2–)4–14 cm;

stipules sometimes connate-sheathing at proximal nodes (vars. humistratus and missouriensis), (2–)3–9 mm, firm or submembranous becoming scarious or papery;

leaflets (5–)11–17(–21), blades elliptic to obovate, 3.5–13(–17) mm, apex acute, apiculate, or obtuse, surfaces strigose to strigulose.

(3–)5–15-flowered.

(3–)4–15-flowered, flowers ascending to spreading;

axis (0.5–)1–4 cm in fruit;

bracts 2.5–8 mm;

bracteoles 0–2.

ascending, (1.5–)3.5–11 cm.

1–3.5 mm.

calyx 9–12(–14.3) mm, tube 6.3–9(–9.3) mm, lobes 1.4–4.5(–5.3) mm;

corolla usually pink-purple, rarely white;

banner (14.5–)16–22(–24) mm;

keel (11.5–)12.8–17.3(–18.5) mm.

9.5–22(–24) mm;

calyx purple-tinged, cylindric or deeply campanulate, 5–13(–14.3) mm, strigulose, tube 4.1–10 mm, lobes subulate, (0.7–)1.4–4.5(–5.3) mm;

corolla usually pink-purple, purple, lavender, or violet-red, rarely white;

banner recurved through 45°;

keel 8.9–17.3(–18.5) mm.

ascending, initially subterete or ± dorsiventrally compressed, ± straight, subsymmetrically oblong-ellipsoid, ± laterally compressed and obtuse-angled when mature, 15–28(–30) × (4–)5–9(–10) mm, subunilocular, base obtuse or sometimes cuneate, apex abruptly contracted into subulate, pungent beak, sutures prominent, strigulose.

usually persistent, ascending or descending, brownish becoming black, straight or slightly incurved, subsymmetrically or obliquely oblong, oblong-ellipsoid, or ellipsoid, subterete, or dorsiventrally or ± laterally compressed, (11–)14–28(–30) × (4–)5–9(–10) mm, unilocular or subunilocular, distinctly beaked, fleshy becoming stiffly leathery or subligneous, walls much less than 1 mm thick, strigulose, strigose, or glabrous.

(33–)40–50(–56).

(33–)35–55(or 56).

= 22.

= 22.