Diagnose: —Planta maxima acaulis, rupicola. Folia coriacea rigidissima ad 50 cm longa, 1.5 cm lata, sensim acuminata, lepidibus parvis cinerascentia, dense fasciculatimque arcuatim recurva; vaginis 12 cm longis, 6 cm latis, longe ovatis, rosulata, suberecta. Inflorescencia folia multi superans optime arcuatilis, 2-pinnatium, panicula arcuatilis, semiflabellatis, 26 floris complanatis.Edited from : Cact. Suc. Mex.. (protologue) .