^ leucotricha D. C. • 50 



Lindheimeri Eng. 44 



megacantha S. D. 57 



megarhiza Rose 42 



mesacajitha-caespitosa Raf . 55 



microdasys Leh. 42 



paluda Rose 38 



püifera Weber 53 



' Poíísw S.D. 43 



pumila Rose 41 



rastrera Weber 44 



robusta Wendland 58 



rufida Eng. _ 42 



setispina Eng. 43 



stenopetala Eng. 60 



streptacantha Lem. 57 



tosa/o Eng, 32 



tomentosa S. D. ' 49 



tunicata Leh. 37 



undulata D. Griff iths 55 



i;iZis Rose 38 



vulgaris Mili. 15 



PACHYCEREUS Berger 68 



chrysomallus Lem. " 71 



Gaumeri Britt. and Rose ' 71. 



grandis Rose 70 



marginatus P. D. C. 72 



Orcutti K. Brandegee 71 



pecten-aboriginum Eng. 79 



PHnglei Wats. ' 69 



ruficeps Weber 72 



tetetzo Weber 72 



PELECYPHORA Ehrbg. 153 



asellif ormis Ehrbg. 153 



pectinata K. Sch. 153 



PENIOCEREUS Berger. 75 



Greggii Eng. 76 



PERESKIA Plumier. 21 



^ Meo P. D. C. 23 



Conzattii Britt. and Rose 2o 



^78 



