The mighty sahuaro cactus and its yellow and white blooms.
 

San Xavier del Bac, the "White Dove of the Desert". Tucson is full of history and art. 
 

Takeshi Tenno (Visiting from Japan), David Kim and Nadja Wehmeyer taking a break from research to enjoy a hike.
 

Mesquite trees are everywhere. Beautiful, hardy, and very allergenic in pollen season. 
 

There is lots of color in the desert in the spring. Here, fuschia cactus flowers bloom. 
 

The desert isn't always hot!  Snow blankets the shrubs, sahuaros and the mountains in the distance.