200-acre arboretum in a ponderosa pine forest, home to a large collection of high-country wildflowers. Guided tours, gift shop, nature trails, endangered plants and animals and cultivated gardens.

Located in the rugged terrain of Superior, the arboretum includes a cactus garden, a legume garden, and a demonstration garden. Virtual tours, plant and animal information.

Aims at education, research, exhibition, and conservation of desert plants of the world, especially the Southwestern United States. Descriptions and photos, information about visiting and programs, and horticultural tips.

A 49-acre desert preserve in Tucson that hosts a museum, tea room, and special events. Includes a history, photo gallery, events calendar, admission, membership, and volunteer information.

Dedicated to horticultural and ecological education, with 16 gardens representing a variety of gardening traditions and botanical themes. History, special events, volunteer and membership information.

The Tucson campus holds over 500 tree species, including some of the largest specimens in Arizona. History, maps, walks, events, and information about the heritage trees.