Xerophyte

Central Spines

3, brownish, 2 of them terete, but the middle one flattened, erect or connivent, longer than the other 2, sometimes 3 to 4 cm (or more) long, never annulate.

Note

“zacatecasensis” for the occurrence in the State of Zacatecas, Mexico.

Flowers

3-4 centimetres broad, nearly white or with a pink mid-vein. Inner perianth-segments linear-oblong, with an ovate apiculate tip, slightly tinged with lavender, 15 mm long. Style slender. Stigma-lobes bifid. Scales on the ovary broadly ovate, apiculate, scarious.

Blooming Season

Early spring.

Ribs

About 55, wavy, tight and very thin.

Stem

Solitary, globose, pale green with an umbilicate top, 8-10 cm wide and tall.

Radial Spines

10 to 12,acicular, white, 8-10 mm long radiating usually cream-white.

Areoles

Covered with white felt in young plants.