Ferocactus stainesii (Salm-Dyck) Britton & Rose

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Ferocactus stainesii (syn: Ferocactus pilosus) is a simple or clumping barrel/column cactus with thick red spines. In habitat plants must be a great age, often forming into quite massive groups, with several subsidiary barrels growing from the main one, with deep green bodies densely covered with bright red spines up its entire length. Most plants have bright red spines with bristle-like, but in some populations the white bristles are occasionally absent.

Origin and Habitat: Ferocactus stainesiiSN|13424]]SN|13428]] (Ferocactus pilosusSN|13428]]SN|13424]]) is endemic to Mexico, where it occurs in the states of Coahuila, Durango, Nuevo León, San Luis Potosí, Tamaulipas, and Zacatecas. It occurs throughout much of the northern portion of the Mexican Altiplano and therefore is somewhat variable. This species is common. The estimated population size is more than 1,000,000 plants.

Habitat: This species is found in semi-desert on various soil types, but most often on rocky limestone hillsides. It is threatened by illegal collection of individuals from wild subpopulations. Removal of floral buds for human consumption could be affecting the populations.

Description: Ferocactus pilosusSN|13424]]SN|13424]] is still known by the commercial growers as Ferocactus stainesiiSN|13428]]SN|13428]], but most authors have dismissed Ferocactus stainesiiSN|13428]]SN|13428]] as perhaps not worthy of even varietal status, suggesting that there is not really a fundamental difference between the two and this description can be applied to all the synonyms of the type species taxa.
Taxonomy note: Britton and Rose (1922, p. 124) placed stainesii in their new genus Ferocactus, and listed pilosus as a synonym, based on their interpretation of the rules of priority, but the priority of names are now reversed.
For more details see: Ferocactus pilosusSN|13424]]SN|13424]]

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