Contents
List of Illustrations
List of Genera, Species, and Varieties
Introduction
New Taxa and Nomenclatural Recombination
Classification of Cacti
Key to the Genera
1. Opuntia (Prickly Pear Cholla)
2. Cereus
3. Echinocereus (Hedgehog Cactus)
4. Mammillaria
5. Ferocactus (Barrel Cactus)
6. Echinocactus (Barrel Cactus)
7. Sclerocactus
8. Pediocactus
10. Neolloydia
11. Coryphantha
General Considerations
Special Groups
Index