Carl Purpus, Plant Collector in Western America Ball Cactus (Pediocactus simpsonii var. minor).  
 

 

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Ball Cactus (Pediocactus simpsonii var. minor), which Purpus collected near Surface Creek, occurs in dry Pinyon-Juniper-Sagebrush sites. On western slopes of Colorado the flowers are more often yellowish. June 1892.

 

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Date and time this article was prepared: 6/7/2002 7:34:51 PM