Scientific Name: Opuntia polyacantha Haw.
Photographer: Patrick Alexander
Locality: near Pool Creek, Dinosaur National Monument, 18 Jun 2008.
Notes: Frates: O. fragilis has cylindric to obovoid, detachable pads, strongly barbed spines, and is mat forming. When flattened, its pads are either only slightly flattened; if more the plants are introgressed.
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