606 MISC. PUBLICATION 42*3, U. S. DEPT, OF AGRICULTURE 



9. Mammillaria fasciculata Engelm. in Emory, Mil. Reconn. 157 



1848. 



Graham (?), Pinal, and Pima Counties, 1,200 to 3,000 feet, May and 

 June, type from along the Gila River, Graham (?) County. Arizona 

 and Sonora. 



This little fishhook cactus has great tolerance for saline soil and 

 seems to show preference for deep soils. Although often abundant, 

 the plants usually grow under shrubbery and are not easily found. 



10. Mammillaria microcarpa Engelm. in Emory, Mil. Reconn. 157. 



1848. 



Neomammillaria milleri Britt. and Rose, Carnegie Inst. Wash. 

 Pub. 248. 4: 156. 1923. 



Western and southern Arizona up to 4,500 feet, common in both 

 heavy and well-drained soil, June and July, type from Pinal County. 

 Southern Utah to western Texas, Arizona, California, and northern 

 Mexico. 



A widespread and variable species (pi. 24) . Neomammillaria milleri, 

 type from near Phoenix, is one of the stout forms. 



11. Mammillaria oliviae Orcutt, West Amer. Sci. 12: 163. 1902. 

 Cochise and Pima Counties, 3,500 to 4,500 feet, type from Pima 



County. Arizona and Sonora. 



A neat plant, hoary with a dense covering of short, white, prevail- 

 ingly straight spines. 



12. Mammillaria wilcoxii Tourney ex Orcutt in Schumann, Gesamtb. 



Kakteen 545. 1899. 



Neomammillaria viridiflora Britt. and Rose, Carnegie Inst. 

 Wash. Pub. 248. 4: 153. 1923. 



Hualpai Mountain (Mohave County) and in Pinal, Graham, and 

 Santa Cruz Counties, 2,500 to 5,000 feet or higher, May and June, 

 type locality Arizona. Known only from Arizona. 



A variable endemic species not uncommon in the vicinity of Superior, 

 Pinal County, near the type locality of N. viridiflora. The original 

 description of M. wilcoxii is incomplete and Tourney's plant may 

 never be identified with certainty. We have observed only greenish 

 subglobose berries on plants of this nature, and have no evidence 

 that the species bears scarlet clavate berries as implied by Britton and 

 Rose (ibid. p. 69) in their key to the genus Neomammillaria. The 

 Arizona plant is closely related to, or possibly identical with, M. 

 barbata Engelm., a rare Mexican species. 



13. Mammillaria macdougalii Rose in Bailey, Standard Cycl. Hort. 4: 



1982. 1916. 

 Cochise, Santa Cruz, and Pima Counties, 3,000 to 5,500 feet, rocky 

 situations, March and April, type from Pima County. Known only 

 from Arizona. 



14. Mammillaria heyderi Muhlenpfordt, Allg. Gartenztg. 16: 20. 



1848. • 

 Bisbee, Cochise County (Peebles SF 922), May. Texas, New 

 Mexico, Arizona, and northern Mexico. 



