Abstract
A new species of club cholla (Grusonia robertsii) endemic to the Vizcaíno Desert of Baja California Sur is described here for the first time. Distribution, associated vegetation, rarity, affinities to other related species, a botanical illustration, a key to the species in the genus Grusonia of the Lower California region, and a key for the generic reclassification of Opuntia sensu lato as recognized by Wiggins (1980) but currently treated as three different genera in the region are also presented.
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