CONTENTS. 



Tribe Cereeae 



Key to Subtribes 



Subtribe Cereanae . . . 



Key to Genera 



Cereus 



Mouvillea 



Cephalocereus 



Espostoa 



Browningia 



Stetsonia 



Escontria 



Corryocactus 



Pachycereus 



Leptocereus 



Eulychnia 



Lemaireocereus 



Erdisia 



Bergerocactus 



Leocereus 



Wilcoxia 



Peniocereus 



Dendrocereus 



Machaerocereus 



Xyctocereus 



Brachycereus 



Acanthocereus 



Heliocereus. . . 



Trichocereus . . 



PAGE. 



i 

 3 



21 



25 

 60 



63 

 6 4 

 65 



66 



68 



77 



82 



85 



104 



107 



1 08 



no 



I 12 

 113 



"4 

 "7 

 120 



121 

 12? 



130 



PAGE. 



Tribe Cereeae continued. 



Subtribe Cereanae continued. 



Jasminocereus 146 



Harrisia 147 



Borzicactus 159 



Carnegiea 164 



Binghamia 167 



Rathbunia 169 



Arrojadoa 1 70 



Oreocereus 171 



Facheiroa 173 



Cleistocactus 1 73 



Zehntnerella 176 



Lophocereus 177 



Myrtillocactus 178 



Neoraimondia 1 8 r 



Subtribe Hylocereanae 183 



Hylocereus 183 



Wilmattea 195 



Selenicereus 1 96 



Mediocactus 210 



Deamia 212 



Weberocereus 214 



Werckleocereus 216 



Aporocactus 217 



Strophocactus 221 



Appendix 223 



Index 227 



in 



