plant stemless, flowering 20 - 25 cm high. leaves many in a dense spreading rosette; sheath broadly ovate, dark, forming a pseudobulb 3 - 4 cm long; blade narrowly triangular, subulate, 12 –14 cm long, 4 - 5 mm wide, channelled, coriaceous, rigid, appressed-lepidote, the lower arching-recurved, the upper ascending. inflorescence: peduncle very short, ascending; peduncle bracts erect, imbricate; fertile part simple, distichous flowered, lanceolate, complanate, 9 - 10 cm long, 2.5 cm wide; floral bracts densely imbricate, 25 - 30 mm long, 15 - 16 mm wide, exceeding the sepals, carinate, glabrous, lustrous, faintly nerved. flowers: sepals 18 mm long, carinate, glabrous; petals tubular erect, 4 cm long, purple. stamens and pistil exserted.Edited from : Cact. Suc. Mex.. .