﻿view of the great variability in this genus and in view of 

 the peculiar soil in which it grows, I prefer to consider it 

 as a mere variety. Found growing among the spruces at 

 8000 feet altitude, on the most barren clay soil. 



Platystemon Californicus Benth. This is P. crinitus 

 Greene, but the characters given by Greene do not hold 

 out. No. 5 1 21. Jones, Diamond Valley, Utah, April 

 28, 1895, 3500° alt., in sand. 



Cardamine cordifolia Gray. 



No. 5341. June 1, 1894, Marysvale, Utah, 7000 alt., 

 in cold spring. 



This is a form with stems and often the leaves short- 



Ciirdamine cordifolia var. incana Gray. 



No. 5341a. June 1, Marysvale, Utah, 7000 alt., in 

 gravel, in cold springs. 



Very pubescent above, with spreading white hairs. 



Arabis hirsuta var. glabrata T. & G., Fl. 1, 80. 



No. 5683. July 25, 1894, Mt Ellen Park, Henry 

 Mountains, Utah, 9000° alt., in gravel. 



No. 5743b. August 4, 1894, Fi sh Lake, Utah, 9000° 

 alt., in meadows. 



No. 5601b. July 6, 1894, Soldier Summit, Utah, 7300° 

 alt., in gravel. 



No. 5537c. June 29, 1894, Thistle, Utah, in gravel, 

 5300 alt. 



No. 6054c. September 17, 1894, Nagle's Ranch, 

 Arizona, Buckskin Mountains, 7800 alt., on the edge of 



No. 57311". Fish Lake, Utah, 9000 alt., in gravel. 



This seems to be a well-marked variety, differing from 

 the typical hirsuta of Europe in the leaves being either 

 entire or sparsely dentate, while the European plant seems 

 to be characterized by very long and often hooked teeth, 



