First description by W.A. & Betty Fitz Maurice, CSJ US Amerika 5:263 - 268 (2001)

Body: Plants solitary, stems globose, dark green, to 2 cm high and 2.5 cm in diameter.
Roots: Fibrous.
Sap: Usually without latex
Tubercule: Conical with rounded tips, 2 mm wide and long.
Axil: With a little wool
Radial spine: 50 - 63, straight, white, pectinately arranged, 2 mm long.
Central spine: 1, straight, ascending, dark red, 4 mm long and 0.25 mm wide, dark brown with brownish to yellowish base.
Flower: Funnelform, white with pinkish brown midstripes, to 6 mm long and 8 mm wide.
Fruit: Green, club shaped, 2 mm long and wide.
Seed: Brownish black, with partially lateral hilium, coarsely pitted, 1 mm long and 0.6 mm wide.
Habitat Substrate: Volcanic rocks.
Geographic Distribution: Zacatecas, Municipio Via Garcia, Mexico. Altitude 2.000 m.
Bibliography: MafM 26(1): 32 - 37 (2002)