8o Mnhlenbergia, Volume 7 



Opiintia Bigelovii Engelni. 

 One of the most abundant cylindropuntias of the Colorado 

 desert, and also frequent in the eastern parts of the Mojave des- 

 ert, often forming extensive thickets of pure growth. 



EcHiNOCACTUS POLYANCiSTRUS Engelm. & Bigel. ex Engelm. 

 Proc. Am. Acad. 3: 272. 

 Mojave desert near Daggett, 1893, W. G. Wright. This 

 must be near the type locality, which is given in Pac. R. R. 

 Rep. 4: 29, as "gravelly hills and sandy plains at the headwat- 

 ers of the Mojave, on the eastern slope of the Californian Cor- 

 dilleras, one days journey before reaching Cajon Pass, March 15, 

 1854." Coville (Cont. U. S. Nat. Herb. 4: no) reports it from 

 the same region. One of the rarer species. 



ECHINOCACTUS VIRIDESCENS Nutt. in Torr. & Gray. Fl. N. Am. 

 1: 554. O. Orciittii Engelm. mss. ex Orcutt, W. Am, 

 Scientist 3: 49./^ O. Ii77iatiis Engelm. mss. ex Coulter, 

 Cont. U, S. Nat. Herb. 3: 337. 

 Hills near San Diego. 



CerEUS ENGEI.MANNI Parry in Engelm. Am. Journ. Sci. II. 14: 



338. 

 Very common in both deserts: Mountain Springs, San Fe- 

 lipe, Whitewater, Hesperia, Camp Cady. Providence moun- 

 tains, according to Brandegee, Zoe 5: 149. 



Cereus mojavensis Engelm. & Bigel. ex Engelm. Proc. Am, 

 Acad. 3: 281. 

 In rounded masses of twenty to one hundred or more com- 

 pacted heads 6 to 12 inches high. Mojave slope of the San Ber- 

 nardino mountains; Cushenberry canyon, May, 1882, Parish 

 1 24^; Green Lead mine. Also at Ivanpah. McHaney's mine 

 near Seven Palms, Alverson. Providence mountains, according 

 to Brandegee, Zoe 5: 149. 



IvYCiUM Andersonii var. Wrightii (jray 

 Reaches Riverside, where it was collected by Reed in Ter- 

 (luisquite canyon. 



