Barrie Britton / Grizzly Bear Prickly Pear Cactus (Opuntia erinacea), Vermillion Cliffs, Arizona, USA.

Tim Fitzharris / Grizzly Bear Cactus (Opuntia erinacea) and Peppergrass (Lepidium papilliferum) close up of bloom, North America

Tim Fitzharris / Grizzly Bear Cactus (Opuntia erinacea) in bloom, North America

Tim Fitzharris / Evening Primrose (Oenothera erythrosepala) with Grizzly Bear Cactus (Opuntia erinacea), North America