508 SMITHSONIAN MISCELLANEOUS COLLECTIONS [VOL. 50 



Illustrations : Pac. R. Rep. 4: pi. 17. figs. 5, 6; pi. 18. fig. 4; pi. 24. 

 iig. 12; Cact. Mex. Bound, pi. 73. figs. 16, 17. 



OPUNTIA THURBERI Engelm. 



Opuntia thurberi Engelm. Proc. Am. Acad. 3: 308. 1856. 



Type locality: Bacuachi, Sonora. 

 Distribution : Sonora. 



OPUNTIA WHIPPLEI Engelm. & Bigel. 

 Opuntia zvhipplei Engelm. & Bigel. Proc. Am. Acad. 3: 307. 1856. 



Type locality : About Zuni, New Mexico. 

 Distribution : New Mexico and Arizona. 

 Illustration : Pac. R. Rep. 4 : pi. 24. figs. 9, 10. 



OPUNTIA SPINOSIOR (Engelm. & Bigel.) Tourney 



Opuntia zvhipplei spinosior Engelm. & Bigel. Proc. Am. Acad. 3: 307. 1856. 

 Opuntia spinosior Toumey, Bot. Gaz. 25: 119. 1898. 



Type locality : South of the Gila River. 

 Distribution : Arizona and northern Mexico. 

 Illustration : Gard. & For. 9 : fig. 1. 



OPUNTIA SPINOSIOR NEOMEXICANA Toumey 



Opuntia spinosior ncomexicana Toumey, Bot. Gaz. 25: 119. 1898. 



Type locality : None given, but Toumey writes : Tucson plains, 

 between Tucson and the Santa Catalina Mountains [Arizona]. 

 Distribution : Southern Arizona. 



OPUNTIA ACANTHOCARPA Engelm. & Bigel. 

 Opuntia acanthocarpa Engelm. & BiGEL. Proc. Am. Acad. 3:308. 1856. 



Type locality : On the mountains of Cactus Pass, about 500 miles 

 west of Santa Fe. 



Distribution : Arizona and California ; reported also from Utah, 

 Nevada, and Sonora. 



Illustrations: Pac. R. Rep. 4: pi. 18. figs. 1-3; pi. 24. fig. 11; N. 

 Am. Fauna 7 : pis. 7, 8. 



OPUNTIA VERSICOLOR Engelm. 



Opuntia versicolor Engelm.; Coult. Contr. Nat. Herb. 3: 452. 1896. 



Type locality : Tucson, Arizona. 

 Distribution : Arizona and northern Mexico. 

 Illustration : Bull. Torr. Club 32 : pi. p. figs. 4-8. 



