Herbs, perennial or annual, not rhizomatous, 1-5 m. Stems scandent or sprawling, freely branched, herbaceous, glabrous or papillose to scabrid, not glaucous. Leaves: ocrea usually deciduous, tan or brown, cylindric to funnelform, 1-6 mm, margins oblique, face not fringed with reflexed hairs and slender bristles at base, otherwise glabrous or scabrid; petiole 0.5-10 cm, glabrous or scabrid in lines; blade cordate, truncate-deltate, or hastate, 2-14 × 2-7 cm, base cordate, margins wavy, scabrid, apex acuminate, abaxially and adaxially faces glabrous or papillose to scabrid, not glaucous, the abaxial rarely minutely dotted. Inflorescences axillary, erect or spreading, racemelike, 1-28 cm, axes scabrid; peduncle 0.1-7 cm or absent, scabrid. Pedicels ascending or spreading to reflexed, articulated distally, 4-8 mm, glabrous. Flowers bisexual, 3-6 per ocreate fascicle; perianth accrescent in fruit, green to white or pinkish, 3.8-8 mm including stipelike base, glabrous; tepals elliptic to obovate, apex obtuse to acute, outer 3 winged; stamens 8; filaments flattened proximally, pubescent proximally; styles connate; stigmas capitate. Achenes included, dark brown to black, 2-6 × 1.4-3.5 mm, shiny, smooth; fruiting perianth glabrous, wings undulate or crinkled, rarely flat, (0.7-)1.5-2.1 mm wide, decurrent on stipelike base nearly to articulation, margins wavy-crenate to incised or lacerate, rarely entire. 2n = 20.
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