Cylindropuntia 11a Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 12c Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 13 NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 1b NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 2b NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3a W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3b W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3e W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3f W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 4a W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 4b W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 5b Saguaro National Park 6, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 6 Saguaro National Park 6, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 7a Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 7b Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 7c Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia arbuscula 1 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia arbuscula 4 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 1 Joshua Tree National Park, CA 130416 (2) - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 10 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 2 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 3 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 9 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf acanthocarpa 1 Sabino Canyon, Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf acanthocarpa 2 Sabino Canyon, Tucson, Arizona 130424 - Kopia - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf leptocaulis 3 Saguaro National Park, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia molesta 1 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia molesta 2 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia prolifera 2 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia prolifera 3 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia prolifera 4 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 1 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 3 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 4 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 5 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 6 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia spp 1 NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 10a Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 10b Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 11b Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 12a Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 12b Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 1a NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 2a NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3c W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 3d W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 5a W Tucson, Arizona 130424 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 8a Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 8b Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia 9 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia arbuscula 2 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia arbuscula 3 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 4 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 5 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 6 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 7 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia bigelovii 8 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf echinocarpa 1 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf echinocarpa 2 S Borrego, Anza Borrego, CA 130421 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf leptocaulis 1 Saguaro National Park, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia cf leptocaulis 2 Saguaro National Park, Tucson, Arizona 130425 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia echinocarpa 3 SW La Quinta, CA 130417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia echinocarpa 4 SW La Quinta, CA 130417 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia prolifera 1 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia prolifera 5 Desert Botanical Garden, Phoenix, Arizona 130426 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia ramosissima 2 Joshua Tree National Park, CA 130416 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).

Cylindropuntia spp 2 NW Ocotillo, CA 130422 - Photo: Jan Thomas Johansson (© 2014 Jan Thomas Johansson).