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Cane cholla blooming (Cylindropuntia imbricata). At San Pedro House.
Cane cholla (Cylindropuntia imbricata) near Patagonia, Santa Cruz County, Arizona.

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Grasslands in winter, No. 4.

Grasslands in winter, No. 3.

Cane cholla (Cylindropuntia imbricata) at San Pedro House, Cochise County, Arizona.

Cane cholla (Cylindropuntia imbricata), at the San Pedro Riparian National Conservation Area, Cochise County, Arizona.

Cane cholla (Cylindropuntia imbricata), at the San Pedro Riparian National Conservation Area, Cochise County, Arizona.

Cane cholla blossoms (Cylindropuntia spinosior), at the Desert Botanical Garden, Phoenix, Arizona.