CONTENTS. 



Tribe 3. Cereeae — continued from Vol. III. page 



Subtribe 6, Coryphanthanae , 



Key to Genera , 



Ancistrocactus , 



Thelocactus 5 



Neolloydia i^ 



Mamillopsis j o 



Cochemiea 21 



Coryphantha 23 



Neobesseya ^ i 



Escobaria ^2 



Bartschella ^y 



Pelecyphora ^^ 



Phellosperma go 



Dolichothele - gi 



Solisia 64 



Neomammillaria 65 



Subtribe 7, Epiphyllanae r'". 177 



Key to Genera ly^ 



Zygocactus ^. j^y 



Epiphyllanthus 180 



Schlumbergera 182 



Epiphyllum 185 



Disocactus 201 



Chiapasia 203 



Eccremocactus 204 



Nopalxochia 204 



Wittia 206 



Subtribe 8, Rhipsalidanae 208 



Key to Genera 208 



Erythrorhipsalis 208 



Rhipsalidopsis 209 



Pfeiffera 210 



Acanthorhipsalis 211 



Pseudorhipsalis 213 



Lepismium 215 



Hatiora 216 



Rhipsalis 219 



Appendix 249 



Index 291 



III 



