Flora of North America species comparison

erect, brownish red to maroon-green, apex never flexuous.

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

petiole 0.5–2 mm;

blade acicular to narrowly oblong, 1–6 × 0.2–0.6 cm, base acute to subcuneate, margins usually entire, sometimes serrulate, apex acute to obtuse.

petiole 15–85 mm;

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

terminal (appearing leaf opposed) or axillary, glands absent, staminate flowers 2–3(–5) per raceme;

staminate bracts 2–2.5 mm.

terminal (often appearing leaf-opposed), glands absent, staminate flowers 20–60 per raceme;

staminate bracts 1.5–2 mm.

staminate 1–2 mm, persistent base 0.5–0.8 mm, pistillate 2–3 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(–5), green, 1–2.5 mm;

stamens 3–4, filaments 1.2–1.4 mm, connate basally.

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals lanceolate, 1.5–2 mm;

styles connate 1/5 length;

stigmas undulate to slightly papillate.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

4–5 mm wide.

11–13 mm wide.

mottled dark olive brown, 2.5–3 mm.

dark brown, 4.3–5.3 mm.

, 15–20 dm.