Flora of North America species comparison

trailing or twining, sometimes rooting at nodes, hirsute.

stipules triangular, 3–5 mm, base slightly auriculate-cordate;

petiole 1.5–8 cm;

rachis 0.4–1 cm;

stipels linear, 1.5–2.5 mm;

leaflet blades ovate- or linear-lanceolate, 3–8 × 0.5–5 cm, base obtuse or rounded, apex acute or acuminate.

often flexuous, floral nodes 10–15, mostly clustered at apex;

bracts deciduous, ovate-lanceolate, 1–1.5 mm.

to 30 cm.

ascending, curved distally, 3–5 mm;

bracteoles tardily deciduous, triangular, 1.5–2.5 mm.

calyx tube 4.5–6 mm, apex acute to acuminate, adaxial lobe broader, 2.5–3.5 mm;

corolla yellow, 15–20 mm;

banner suborbiculate, 1.5–2 × 1.5–2 mm, with 2 basal auricles;

wings obliquely obovate, 15 × 1 mm;

keel broadly curved, vertically incurved, 15 × 5–6 mm;

style curved, extending beyond stigma into tip.

pendulous, brown-black in age, linear, torulose, 4–7 × 0.5–0.8 cm, strigose to pilose.

5–12, brownish black, reniform, 4–6 × 3–4 mm;

hilum white, not raised.

perennial.