Flora of North America species comparison

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

erect, green, apex flexuous.

petiole 15–85 mm;

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

petiole 5–13 mm;

blade suborbiculate to ovate, 1.2–3 × 1–2.3 cm, base subcordate, margins dentate to serrate, apex acute.

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 12–20 per raceme; staminate bracts 0.8–1.2 mm.

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

staminate 1.5–1.9 mm, persistent base 0.5–0.7 mm; pistillate 3.2–3.7 mm in fruit.

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals 3–4, green, 1–1.5 mm;

stamens 3–4, filaments 0.4–0.6 mm.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

sepals lanceolate, 1.5–3 mm;

styles connate 1/4–1/3 length;

stigmas undulate.

11–13 mm wide.

6–7 mm wide.

dark brown, 4.3–5.3 mm.

dark brown with light brown streaks, 2.4–3 mm.

, 15–20 dm.