Origin and Habitat: Mexico (Queretaro).

• Echinocereus schmolii var. nerispina (A.Cartier) hort.
• Wilcoxia nerispina A.Cartier

• Echinocereus schmollii (Weing.) N.P.Taylor
• Cereus schmollii Weing.
• Wilcoxia schmollii (Weing.) Backeb.
• Echinocereus schmolii var. nerispina (A.Cartier) hort.
• Wilcoxia nerispina A.Cartier
• Echinocereus schmollii var. nigra

Description: Echinocereus schmolii v. nerispina (Wilcoxia nerispinaSN|34229]]SN|34229]]) is generally included within (as a synonym of) Echinocereus schmolliiSN|8675]]SN|8675]], suggesting that there is not really a fundamental difference between the two, however it is sometimes considered distinct enough to be worthy of varietal status on the basis of darker, stiffer spination
Derivation of specific name. The name “nerispina”, meaning "black spined", refers to the grey or black colouration of central spines. The usually darker colour or the spines helps distinguish this cactus from the otherwise identical Echinocereus schmolliiSN|8675]]SN|8675]]
Stems: Cylindrical 1-2 cm in diameter.
Spines: Grey to blackish.
Flowers: For the most part lateral, lilac pink.
For more details see: Echinocereus schmollii

Bibliography: Major references and further lectures
1) Willy Cullmann, Erich Götz (Dozent Dr.), Gerhard Gröner “The encyclopedia of cacti” Timber Press, 1987
2) British Cactus & Succulent Journal, Cactus & Succulent Society, 2001

Cultivation and Propagation: This cactus is used to be considered difficult and somewhat rare in cultivation. It likes regular irrigation at time of growth, but do not over water.
Sun Exposure: Best in full or partial sun exposure. In mild climate they grow well when planted freely outside in well-drained soil.
Frost hardiness: It is quite frost hardy -7 (-10)° C.
Maintenance: During the winter months it may become dormant, during which no moisture is required, and the plants should be grown cool and dry (at -5 +10°C). This is important for the flowers as well as for its health. Without this cool winter period it normally won't get any buds.
Propagation: Seeds (usually), it also can be grown from stem and root cuttings.