616 MISC. PUBLICATION 4 2 3, U. S. DEPT. OF AGRICULTURE 



32. Opuntia fulgida Engelm., Amer. Acad. Arts and Sci. Proc. 3: 306. 



1856. 



Cylindropuntia fulgida Knuth in Back, and Knuth, Kaktus- 

 ABC 126. 1935. 



Southern Arizona, up to 4,000 feet, common, June to August. 

 Arizona to Sinaloa. 



Cholla. The var. mammillata (Schott) Coult., which is distinguished 

 by less densely armed joints, occurs with the typical form but often 

 replaces the latter at the higher elevations. Cattle relish the fruits of 

 both forms and will eat the viciously armed joints if the spines are 

 scorched. In fact, a few cattle acquire a taste for this cholla and 

 actually eat the spiny joints as they occur in nature, The reticulate 

 stems are used in the manufacture of small articles of furniture, such 

 as picture frames and lampstands. 



33. Opuntia versicolor Engelm. ex Coult., Contrib. U. S. Natl. Her- 



barium 3: 452. 1896. 



Cylindropuntia versicolor Knuth in Back, and Knuth, Kaktiis- 

 ABC 125. 1935. 



Pinal and Pima Counties, 1,200 to 4,000 feet, common, May, type 

 from Pima County. Arizona and northern Mexico. 

 Deerhorn or staghorn cholla. 



34. Opuntia spinosior (Engelm. and Bigel.) Tourney, Bot. Gaz. 25: 



119. ' 1898. 



Opuntia whipplei var. spinosior Engelm. and Bigel. in Engelm., 

 Amer. Acad. Arts and Sci. Proc. 3: 307. 1856. 



Cylindropuntia spinosior Knuth in Back, and Knuth, Kaktus- 

 ABC 126. 1935. 



Yavapai County to Greenlee, Cochise, and Pima Counties, 1,200 

 to 5,000 feet, occasionally higher, common, May and June, type 

 from southern Arizona. Western New Mexico, Arizona, and northern 

 Mexico. 



An apparent hybrid between 0. spinosior and 0. fulgida is rather 

 abundant in the bed of the Gila River between Florence and Casa 

 Blanca, Pinal County. The hybrid plants propagate freely by means 

 of fallen joints. 



35. Opuntia whipplei Engelm. and Bigel. in Engelm., Amer. Acad- 



Arts and Sci. Proc. 3: 307. 1856. 



Cylindropuntia whipplei Knuth in Back, and Knuth, Kaktus- 

 ABC 124. 1935. 



Apache County to Mohave, Yavapai, and Gila Counties, 3,500 to 

 6,500 feet, common, June and July. Southwestern Colorado, southern 

 Utah, western New Mexico, and Arizona. 



The var. enodis Peebles, characterized by nontuberculate, shallowly 

 umbilicate fruits, is known only from the type collection on Hualpai 

 Mountain, Mohave County, 4,200 feet (Kearney and Peebles SF 883). 

 The fruits of O. whipplei are utilized by the Hopi Indians for food 

 and for seasoning food. 



