602 MISC. PUBLICATION 4 2 3, IT. S. DEPT. OF AGRICULTURE 



Beehive cactus. The flowers are magenta in the typical form. 

 The form bearing greenish-yellow flowers (var. lutescens Parish) is 

 more common in Arizona. 



9. Echinocactus erectocentrus Court., Contrib. U. S. Natl Herba- 



rium 3: 376. 1896. 



Echinomastus erectocentrus Britt. and Rose, Carnegie Inst 

 Wash. Pub. 248. 3: 148. 1922. 



Pinal, Cochise, and Pima Counties, 3,500 to 4,500 feet, March and 

 April, type from Cochise County. Known only from Arizona. 



An atypical form with the lower central spine exceptionally long and 

 stout and the upper central not strictly erect was collected near 

 Florence, Pinal County (Lindsay in 1939). 



10. Echinocactus intertextus Engelm., Amer. Acad. Arts and Sci 



Proc. 3: 277. 1856. 



Echinomastus intertextus Britt. and Rose, Carnegie Inst. Wash 

 Pub. 248. 3: 149. 1922. 



Sonoita, Santa Cruz County (Peebles and Loomis SF 186). South- 

 western Texas to Arizona, and northern Mexico. 



11. Echinocactus whipplei Engelm. and Bigel. in Engelm., Amer 



Acad. Arts and Sci. Proc. 3: 271. 1856. 



Sclerocactus whipplei Britt. and Rose, Carnegie Inst. Wash 

 Pub. 248. 3: 213. 1922. 



Apache County to Mohave County, 4,900 to 7,200 feet, June, type 

 from Navajo County. Southwestern Colorado, southern Utah, and 

 Arizona. 



Large specimens 20 to 25 cm. high differ from descriptions in having 

 as many as 7 central spines and the upper central shorter than the 

 lower ones, much like the radials and not broadly subulate. 



Echinocactus polyancistrus Engelm. and Bigel., of Utah, Nevada, and California, 

 has been reported from Mohave County. According to descriptions, it has a 

 glabrous style and upper central spine 6 to 13 cm. long. In E. whipplei the style 

 is puberulent and the upper central spine is 2 to 6 cm. long. 



12. Echinocactus sileri Engelm. ex Coult., Contrib. U. S. Natl. Her- 



barium 3: 376. 1896. 



Utahia sileri Britt. and Kose, Carnegie Inst. Wash. Pub. 248. 

 3: 215. 1922. 



Type from Cottonwood Springs and Pipe Springs, "southern Utah" 

 (Siler in 1883). 



Pipe Springs is located in northern Mohave County, and in all 

 probability the type specimen was collected in Arizona. In specimens 

 from Pipe Springs (Lindsay in 1939, Peebles and Parker 14692) the 

 tubercles are distinct, although in large plants they are crowded 

 together toward the base of the stem in riblike rows. The spines are 

 exceedingly persistent, and toward the base of old plants become 

 whitened, shreddy, and greatly weathered. 



