Flora of North America species comparison

trailing or twining, dark green, apex flexuous.

erect to decumbent, dark green, apex never flexuous.

petiole 6–22 mm;

blade narrowly ovate to lanceolate, 2.5–4 × 1.5–2 cm, base shallowly cordate to truncate, margins serrate to crenate, apex acute to 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 stipitate, prominent throughout, staminate flowers 10–30 per raceme;

staminate bracts 0.5–1.5 mm.

terminal (often appearing leaf opposed), glands absent, staminate flowers 10–20 per raceme;

staminate bracts 0.5–1.5 mm.

staminate 1–2 mm, persistent base 0.3–0.7 mm;

pistillate 3–7 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, 0.7–1.2 mm;

stamens 3, filaments 0.2–0.4 mm.

sepals 3–4, green, 1–1.4 mm;

stamens 3, filaments 3.5–4 mm.

sepals lanceolate, 0.7–1.5 mm;

styles connate 1/3 length;

stigmas smooth to undulate.

sepals lanceolate, 2–3 mm;

styles connate 1/4–1/2 length;

stigmas undulate to subpapillate.

4–5 mm wide.

6–7 mm wide.

dark brown to black, 1.9–2.2 mm.

dark brown, 3–3.2 mm.