Small, clump-forming, glabrous succulent, up to 250 mm tall, stems leafless, 4-angled, tuberculate, up to 20 mm diam. Flowers 1 or 2 together, arranged along grooves from near middle of stem, peduncle absent, pedicels 4-12 mm long. Corolla rotate, glabrous except for marginal cilia, smooth, 14-21 mm diam., inside dark purple-lined on ± white, tube 1.5-2 mm long, lobes spreading, ovate, 5-8 x 3-5 mm. Corona purple, outer lobes bifid into slender, spreading teeth, inner adpressed to anthers, with truncate dorsal appendage.