Frank and Lau, KuaS, 30(1):6-7, 1979: Corpus subcylindraceum, simplex, ad 30 mm longum, 15-20 mm latum, griseum. Radice napiforme. Costae in mammillas conicas prominentes ordinatas, basi rhomboidea. Areolae parvae, lana albida obtecta, mox glabrescens. Aculei 4-6, juvenili obscure-brunnei, postea grisei, flexiles, plani, apicem incurvati, ad 30 mm longi. Flores ex apice, 15 mm longi, infundibuliformes, pallide viride-flavidi. Stylus roseus stigmatibus albidis, antherae flavidae. Fructus longe-ovoideus, 10 mm longus, basi obscure-viridi, apice obscure-brunnea. Semina obscure-brunnea, Ca. 1 mm longa, ovoidea, hylo ovali, protracto maiusculo, testa minute-verruculosa.
Hábitat: Santa Rita, San Luis Potosí, México.