Flora of North America species comparison

trailing or twining, dark green, apex flexuous.

erect, 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.

petiole 3–15 mm;

blade triangular-lanceolate, 2.7–6.7 × 1–3 cm, base truncate to cordate, margins serrate, apex acute.

terminal (often appearing leaf-opposed), glands stipitate, prominent throughout, staminate flowers 10–30 per raceme;

staminate bracts 0.5–1.5 mm.

terminal (appearing leaf opposed), glands absent, staminate flowers 11–40 per raceme, evenly distributed;

staminate bracts 1–1.5 mm.

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

pistillate 3–7 mm in fruit.

staminate 1.5–2 mm, persistent base 1–1.8 mm, longer than subtending bract;

pistillate 3–4 mm in fruit.

sepals 3, green, 0.7–1.2 mm;

stamens 3, filaments 0.2–0.4 mm.

sepals 3, green, 1.2–2.1 mm;

stamens 3, filaments 0.3–0.8 mm.

sepals lanceolate, 0.7–1.5 mm;

styles connate 1/3 length;

stigmas smooth to undulate.

sepals lanceolate-ovate, 1.3–2.3 mm;

styles connate 1/3 length;

stigmas papillate.

4–5 mm wide.

7–8 mm wide.

dark brown to black, 1.9–2.2 mm.

dark brown, 3–4 mm.

= 44.