Cactus flower photos used on Suzie Weisband's site, with sources and credits.

Alamo Lake Cholla--Buckhorn Cholla flowers
Courtesy of Dr. John Crossley, The American Southwest
www.americansouthwest.net

Hylocereus Cactus flowers.
Photos by La Hoodie, Dra. Secretaria of Arizona Cactus and Succulent Research, courtesy of www.arizonacactus.com

Yucca flowers.
Arizona Cactus

Barrel Cactus flower
Photo courtesy Boyce Thompson Arboretum
http://arboretum.ag.arizona.edu

Prickly pear
Arizona Cactus

Peanut Cactus flower.
Arizona Cactus

Huntingtoniana Cactus flower
Photo courtesy Boyce Thompson Arboretum
http://arboretum.ag.arizona.edu

Trichocereus Huasca.
Arizona Cactus

Arizona Cactus Flower
Photograph by Kevin McGrath
www.mcgrathimages.com

Trichocereus Hybrid.
Arizona Cactus