Convolvulus bidentatus Bernh.

Perennial with a thick taproot. Stems several, slender, prostrate or climbing, up to ±3 m long, usually somewhat 4-angled, glabrous or sometimes pubescent. Leaves narrowly hastate to linear with hastate base, glabrous or pubescent, up to 45-70 mm long and middle lobe 1-8 mm wide; basal lobes up to 25 mm long, usually deeply bifid; apex usually obtuse, mucronate; margin entire; lowermost leaves, if present, sometimes broader, oblong or sagittate-oblong or occasionally palmately 5-7-lobed with middle lobe the longest, up to 15 mm wide. Peduncles mostly 2-flowered, rarely 1-flowered or cymosely 3-5-flowered, 30-140 mm long, rarely shorter, pubescent or glabrous; bracts lanceolate, 3-5 mm long; pedicels short, pubescent, usually somewhat 4-angled and subclavate, 5-15 mm long. Calyx 6-8 mm long, glabrous or very rarely obscurely pubescent; sepals broadly ovate or obovate, rather chartaceous with membranous edges, much imbricate, obtuse to rounded, apex often almost mucronate. Corolla 15-22 mm long, white or pale pink; midpetaline areas slightly hairy outside near apex. Capsule globose, glabrous, ±6 mm wide, almost completely enclosed in calyx. Seeds black, minutely rugose and subpuberulous with tufts of very minute brown hairs.