Flora of North America species comparison

erect, green to purple-green, apex never flexuous.

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

petiole 0–2 mm;

blade usually oblanceolate to linear, sometime elliptic, 2–8(–10) × 0.2–1.4 cm, base acute, margins entire or irregularly and shallowly sinuate, 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 absent, staminate flowers 3–45 per raceme; staminate bracts 1–1.5 mm.

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

staminate 1.3–2 mm, persistent base 0.3–0.6 mm; pistillate 3.5–4 mm in fruit.

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

sepals 4–5, green, 1–1.5 mm;

stamens 2, filaments 0.2–0.4 mm.

sepals 3, green, 0.7–1 mm;

stamens 3, filaments 0.2–0.5 mm.

sepals linear, 1–1.8 mm;

styles connate 1/4–1/3 length;

stigmas undulate.

sepals elliptic to ovate, 1.5–2 mm;

styles connate 1/4–1/3 length;

stigmas papillate.

7–8 mm wide.

11–13 mm wide.

brown with tan streaks, 3–4 mm.

dark brown, 4.3–5.3 mm.

, 15–20 dm.

= 44.