Ferocactus robustus (Pfeiffer) Britton & Rose 1922
Echinocereus robustus Pfeiffer 1837
Clustering Barrel Cactus
Ferocactus robustus means “big robust ferocious cactus”—a reference to the sprawling colonies produced by this species. It is native to Peubla, Mexico.
Identification: Most members of Ferocactus are usually solitary plants, but this one has a profusion of stems, forming masses 3' (1 m) high and up to 16' (5 m) around. Stems are round or elongated ovals 3-6" (8-16 cm) in diameter, with 8 ribs, and spine groups that are further apart than with most of this genus. 4-7 large central spines include a single, hooked, largest spine up to 2" (6 cm) long, and several shorter, straight spines. Central spines are tinged with tan, red, or purple. Underneath are 10-14 smaller, whiter radial spines. Funnel-shaped yellow or yellow-orange flowers are 1-1½" (3-4 cm) in size. Yellow, ball- or oval-shaped fruits are ¾-1" (2-3 cm) in size.
Ferocactus robustus on CactiGuide.com
Ferocactus robustus on Cactus Art: the World of Cacti & Succulents
Ferocactus robustus on PlantSystematics.org
Ferocactus robustus on BioLib.cz
Ferocactus robustus on Flickr
Ferocactus robustus description by Thomas H. Kent, last updated 25 May 2020.
Range: Zones 9b-11: