Flora of North America species comparison

usually decumbent or twining, rarely erect, gray-green to light green, apex flexuous.

erect to decumbent, dark green, apex never flexuous.

petiole 15–85 mm;

blade ovate to broadly cordate, 4.5–10(–13) × 3.5–10 cm, base cordate, margins serrate, apex acuminate.

usually 3-foliolate, sometimes 3-lobed nearly to base;

petiole 7–18 mm;

leaflets: blade lanceolate, base acute, margins deeply and coarsely serrate, sinuses often extending 1/2+ to midvein, apex acute, central one 2.5–4 × 1–2 cm, lateral ones often with basal lobe.

terminal (often appearing leaf-opposed), glands absent, staminate flowers 20–60 per raceme; staminate bracts 1.5–2 mm.

terminal (often appearing leaf opposed), glands absent, staminate flowers 10–20 per raceme; staminate bracts 0.5–1.5 mm.

staminate 1.5–2.2 mm, persistent base 0.7–1 mm; pistillate 2.5–3 mm in fruit.

staminate 0.8–1.6 mm, persistent base 0.3–0.7 mm; pistillate 2.5–3 mm in fruit.

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals 3–4, green, 1–1.4 mm;

stamens 3, filaments 3.5–4 mm.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

sepals lanceolate, 2–3 mm;

styles connate 1/4–1/2 length;

stigmas undulate to subpapillate.

11–13 mm wide.

6–7 mm wide.

dark brown, 4.3–5.3 mm.

dark brown, 3–3.2 mm.

, 15–20 dm.