a scandent undershrub; stems slender, sparingly pubescent, twining, 2–3 ft. long; leaves short-petioled, firmly membranous, simple, deeply 3-partite with the lateral lobes usually unequally 2-fid; lobes lanceolate, acute, their margin sharply serrate, base cordate, 1–1 1/2 in. long, 1 1/2–2 in. wide, somewhat polished on both surfaces, prominently reticulate beneath, very finely pubescent on the nerves; petiole sparingly pubescent, 1/3 in. long; stipules lanceolate, spreading, glabrous, 1 1/2 in. long; heads peduncled; peduncles sparingly pubescent, 1–2 in. long; involucral bracts yellowish, ultimately green, 3/4 in. long, 1 in. across, deep-cordate, shallowly 3-lobed, lobes ovate, acute, their margin serrate; male bracts entire; male calyx finely puberulous, lobes ovate, acute; female calyx-segments linear-lanceolate, densely pinnately lacinulate on each side, lacinulæ slender, glandular, scabrous; ovary puberulous; style columnar, cylindric, dilated at the tip; capsule shortly pubescent, 1/3 in. across; cocci subglobose; seeds globose. null