Plant: Perennial from taproot; stem ± glabrous; trailing or climbing, 1-many; tendril generally 1 per node, often branched, tendril unbranched Leaves: simple, alternate, veined, petioled, round, cordate to ± square, generally deeply lobed; central lobe generally longest; upper surfaces dotted with white glands INFLORESCENCE: staminate flowers in small axillary clusters; pistillate flowers 1 per node Flowers: radial; hypanthium > ovary; corolla 1.5-3 mm wide, rotate or shallowly cup-shaped, cream; stamens 3-5 (or appearing 1-3 from fusion), anthers often > filaments, twisted together; ovary ± inferior, chambers generally 5, placentas parietal, ± growing into chambers, styles 1-3, stigmas generally lobed, large Fruit: dry, indehiscent, asymmetric, ± prickly; body 5-6 mm, ± = beak; Seed 1 Misc: Canyons, washes; < 900 m.; Mar-Apr