Flora of North America species comparison

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

trailing or twining, dark 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 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.

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 stipitate, prominent throughout, staminate flowers 10–30 per raceme; staminate bracts 0.5–1.5 mm.

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

staminate 1–2 mm, persistent base 0.3–0.7 mm; pistillate 3–7 mm in fruit.

sepals 3–4, green, 1–2.2 mm;

stamens 3–6(–10), filaments 0.3–1 mm.

sepals 3, green, 0.7–1.2 mm;

stamens 3, filaments 0.2–0.4 mm.

sepals lanceolate, 0.8–2.5 mm;

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

stigmas smooth to undulate.

sepals lanceolate, 0.7–1.5 mm;

styles connate 1/3 length;

stigmas smooth to undulate.

6–8 mm wide.

4–5 mm wide.

dark brown, 2.5–3.5 mm.

dark brown to black, 1.9–2.2 mm.

= 44.