Stems often tangled among themselves, 3-20 dm. Leaves: petiole 3-25 mm; blade ovate, triangular, or rhombic-orbiculate, 15-60 × 10-45 mm, base obtuse, truncate, or cordate, margins shallowly sinuate, apex usually acute or acuminate, sometimes obtuse or round. Inflorescences: peduncle 4-6 cm; umbel 4-11-flowered; pedicel 3-15 mm. Perianths pale greenish yellow, 3-4 mm, glabrous or with few minute hairs externally near margin of limb. Fruits usually reflexed at tip of pedicel, 7-10 × 1.5-2 mm. Flowering late spring-mid fall. Dry, gravelly areas, often among boulders or shrubs, roadsides; (0-)800-1800 m; Ariz., N.Mex., Tex.; Mexico; West Indies; Central America; South America.

Plant: Perennial forb; stems long and weak, usually supported by other plants Leaves: leaves opposite, petioled, subequal in pair, broadly ovate-cordate, 1-3 cm long Flowers: flowers in umbels, cream, <5mm long Fruit: fruits narrowly clavate with stipitate glands.