Nurseries owned by CACSS members (alphabetical order):

Arizona Cactus Sales
Beautiful landscape cacti and succulents. Very knowledgeable people.

Other plant-related businesses owned by CACSS members:

Baobab Pottery, Mike Cone

IndoorOutdoorDesign.com
Artistic landscape design featuring desert adapted plants.

Rainbow Gardens Bookshop
www.rainbowgardensbookshop.com
Hundreds of books and publications about Cacti and Succulents

Xerophytic Design Inc. 
www.xerophyticdesign.com
A horticulture-based landscape design company

Other links:

Cactus and Succulent Society of America
(CSSA) Parent organization of the Central Arizona Cactus and Succulent Society; publishes Cactus and Succulent Journal of the CSSA and the yearbook Haseltonia, and hosts biennial Conventions.

Desert Botanical Garden
World-famous botanical garden in Phoenix' Papago Park.

Cactus Mall
The largest and busiest information-and-links site for organizations, clubs, businesses, and other Web pages concerning cactus and other succulents.

Boyce Thompson Arboretum
The largest botanical garden devoted to desert plants in the US; just an hour east of Phoenix.

Tucson Cactus & Succulent Society

Arizona Native Plant Society

Henry Shaw Cactus Society, St Louis
Our friends in Missouri.