Pincushion Cactus, Mammilaria standleyi = M. hertrichiana, Arizona, USA

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Photo credit: © Bob Gibbons / Alamy / Afripics
License: Licensed
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Keywords: ., america, american, cactus, desert, hertrichiana, mammilaria, pincushion, prickle, prickles, prickly, sharp, sonoran, spine, spines, spiny, standleyi, usa