Flora of North America species comparison

trailing or climbing, to 250 cm.

stipules usually ascending, ovate to broadly triangular, 1–2.5 × 0.8–2.4 mm;

petiole 2–5.5 cm;

rachis 0.5–2 cm;

stipels linear to ovate-lanceolate, 0.5–1.5 mm;

leaflet blades ovate in outline, not lobed or shallowly to deeply lobed basally, lobes quadrate-obtuse to oblong-attenuate, 1–5 × 1–4.5 cm, membranous to rigid, base broadly cuneate to truncate, apex obtuse to acute, surfaces covered with uncinate hairs, abaxially with incumbent hairs along veins.

1.2–16 cm;

axis covered with uncinate hairs;

rachis 0.2–7.5 cm, with 2–6 biflorous nodes;

primary bracts ovate to lanceolate, 1–2 × 0.5 mm, often pigmented, 3-veined.

often angled, 1–10 cm.

5 mm, hairs uncinate;

bracteoles persistent, oblong-ovate to narrowly triangular, 0.6–1.3 mm, often covered with uncinate hairs.

calyx campanulate, 2–3.5 mm, sparsely to densely covered with uncinate hairs;

abaxial and lateral lobes triangular;

adaxial lobes connate;

corolla pink, lavender, reddish to light purple, or white fading yellowish, 10 mm;

banner oblong to orbiculate, 10 mm, apex emarginate, surfaces glabrous;

wings obovate, 10 mm, apex acute or obtuse;

keel 6 mm;

ovary linear, 3 mm.

pendent, compressed, linear-falcate, 23–35 × 4–5 mm, elastically dehiscent, valves membranous, sparsely covered with incumbent and uncinate hairs.

4–6(or 7), brown, usually oblong to quadrate, rarely reniform, 2–4.3 × 2.3–4 mm, rugose;

hilum ovate, 0.3 mm.

annual or short-lived perennial, frequently mat-forming, with slender taproots.

= 22.