Flora of North America species comparison

erect to trailing, dark green to light green, apex rarely flexuous.

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

petiole 2–20 mm;

blade linear-lanceolate to narrowly ovate, 1–4 × 0.5–2 cm, base truncate to weakly cordate, margins serrate, apex acute.

petiole 15–85 mm;

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

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

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

staminate 0.7–2 mm, persistent base 0.4–1.5 mm; pistillate 2–2.5 mm in fruit.

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

sepals 3–4, green, 1–2.2 mm;

stamens 3–6(–10), filaments 0.3–1 mm.

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals lanceolate, 0.8–2.5 mm;

styles connate 1/3–1/2 length, long-exserted;

stigmas smooth to undulate.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

6–8 mm wide.

11–13 mm wide.

dark brown, 2.5–3.5 mm.

dark brown, 4.3–5.3 mm.

, 15–20 dm.

= 44.