Jack Dykinga / Arizona Barrel Cactus (Ferocactus wislizenii) flower in full bloom amid the cactus spines, Saguaro NP, Arizona, USA
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Mark Moffett / Cactus Bee (Diadasia sp) feeding on barrel cactus nectar, Tucson, Arizona
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Mark Moffett / Cactus Bee (Diadasia sp) feeding on barrel cactus nectar, Tucson, Arizona
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Daniel Heuclin / Arizona Barrel Cactus (Ferocactus wislizenii) in flower. Foothills of Santa Catalina Mountains, Arizona, September.
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Daniel Heuclin / Arizona Barrel Cactus (Ferocactus wislizenii) flowers. Foothills of Santa Catalina Mountains, Arizona, September.
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John Cancalosi / Arizona / Fishhook barrel cactus (Ferocactus wislizenii) with fruit in snow after desert snow storm, Sonoran Desert, Arizona, USA
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John Cancalosi / Arizona / Fishhook barrel cactus (Ferocactus wislizenii) with fruit in snow after desert snow storm, with Prickly pear cactus (Oppuntia spp) in background, Sonoran Desert, Arizona, USA
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John Cancalosi / Fishhook / Arizona barrel cactus (Ferocactus wislizenii) with fruit in snow after desert snow storm with Prickly pear cactus (Opuntia sp) in background, Sonoran Desert, Arizona, USA
David Welling / Arizona barrel cactus {Ferocactus wislizenii} in flower, California, USA
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John Cancalosi / Fishhook / Arizona / Compass Barrel Cactus (Ferocactus wislizeni) Unusual growth form, with fruit, Sonoran Desert, Arizona, USA
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Tim Fitzharris / Saguaro (Carnegiea gigantea) and Giant Barrel Cactus (Ferocactus diguetii) with Panther and Safford Peaks in distance, Saguaro National Park, Arizona
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Philippe Clement / Close up of hooked spines of Barrel cactus {Ferocactus sp.}, Organ Pipe Cactus National Monument, Arizona, USA
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Philippe Clement / Compass / Fishhook Barrel Cactus (Ferocactus wislizeni). Organ Pipe Cactus National Monument, Arizona, USA 2007
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Philippe Clement / Compass / Fishhook Barrel Cactus (Ferocactus wislizeni). Organ Pipe Cactus National Monument, Arizona, USA 2007
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Doug Allan / Barrel cactus above Colorado river {Ferocactus acanthodes} Grand Canyon, Arizona, USA
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John Cancalosi / Fishhook / Compass Barrel Cactus blossom (Ferocactus wislizeni), Sonoran Desert, Arizona, USA
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Tim Fitzharris / Saguaro (Carnegiea gigantea) and Giant Barrel Cactus (Ferocactus diguetii) with Panther and Safford Peaks in distance, Saguaro National Park, Arizona
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Gerry Ellis / Saguaro (Carnegiea gigantea) with Fishhook Barrel Cactus (Ferocactus wislizenii) in the foreground, Sonoran Desert, Arizona
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Pete Oxford / Arizona / Fishhook barrel cactus {Ferocactus wislezenii} Anza Borrego NP, California, US
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Pete Oxford / Arizona / Fishhook barrel cactus {Ferocactus wislezenii} Anza Borrego NP, California, USA
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John Cancalosi / Barrel cactus (Ferocactus sp) in flower, Arizona USA
