Research and Conservation in Southern Sonora, Mexico
Opuntia robusta (nopal rodajón, tuna tapona)

Opuntia robusta near Maycoba, Sonora. Photo: Mark Dimmitt |

Opuntia robusta in the Sierra Oscura above San Bernardo, Sonora. Photo: Mark Dimmitt |

Opuntia robusta flowering in cultivation. The pads of this clone can reach 18 inches wide; it is probably from a population south of Sonora. Photo: Mark Dimmitt |

Opuntia robusta in fruit on Mesa del Campanero near Yécora, Sonora. Photo: T.R. Van Devender |