* Durable, inexpensive, fun to use nature identification guide * Great for families, hikers, and backyard birders * Created by a high-school science teacher This field guide for cacti, shrubs, and trees is a fun, easy way to learn the different types of cacti and dry-environment shrubs and trees native to the Southwest. Bring it along on outdoor adventures. This tough, lightweight laminated card can take abuse and is waterproof.Mac's Field Guides are the perfect plant identification tool for the amateur naturalist, covering a wide variety of subjects and regions in North America. More than 1 millionMac's Guides have been sold!