Leaves: petiole 1–4 cm; blade 2–8(–12) cm, lobe apex acute, sinuses rounded, surfaces glabrous or slightly scabrous, hair bases pustulate. Inflorescences: staminate racemes 8–14 cm; pistillate peduncles 2–5 cm. Flowers lightly fragrant; corolla 8–12(–16) mm diam. Pepos 3–5 cm, spinules 4–6 mm, glabrous or slightly scabrous. Seeds 12–20 mm. 2n = 32.
"High-climbing annual; lvs long-petioled, orbicular in outline, with (3–)5(–7) sharp, triangular lobes; staminate fls in long erect racemes, the cor 8–10 mm wide, with lanceolate lobes, the pistillate few or solitary, short- peduncled from the same axils; fr ovoid, 3–5 cm, green, weakly prickly; 2n=32. Moist ground and thickets, throughout our range and s. to Fla. and Tex.; often cult. July–Sept. (Micrampelis l.)"