﻿HOT. 



AZETTE 



The range of 5. latifolia is stated to be from Newfoundland 

 to Saskatchewan, western Pennsylvania, and Virginia. Judging 

 from specimens, the Newfoundland form is probably distinct. 

 5. tomentosa occurs from Nova Scotia to Manitoba and south to 

 Arkansas and Georgia. The eastern portion of its range, therefore, 

 is covered by S. latifolia and the more western part by S. alba. 



The present tomentose group is represented by S. tomentosa, 

 S. Douglasii Hook., and 5. dasyantha Bge. 26 S. Douglasii occurs 

 in western America from British Columbia to California. It differs 

 from S. tomentosa chiefly in (i) leaves slightly different in shape and 

 serrate only above the middle; (2) tomentum on ventral leaf 

 surfaces always white, never rusty; (3) follicles glabrous, not 

 divergent. S. dasyantha occurs in China and Japan. The fossil 

 species S. Andersoni Heer, from Alaska, is considered most nearly 

 related to S. tomentosa. 21 A somewhat variable condition of 

 S. tomentosa has been segregated as var. rosea. 2 * It differs from 

 the type in having a less compact inflorescence, and the follicles, 

 though tomentose, are not lanate, becoming glabrate as they 

 mature. The type is generally confined to the coastal plain and 

 the Atlantic states, while this variety is found farther south and 

 west in Wisconsin, West Virginia, and North and South Carolina. 

 The variety merges gradually into the type of the species and the 

 two features, (1) degree of compactness of inflorescence and (2) 

 amount of pubescence on the follicles, appear to vary independently. 



S. tomentosa and S. alba must then be looked upon as a spurious 

 pair, while either S. tomentosa and 5. Douglasii or S. alba and 

 S. latifolia constitute real pairs. The tomentose character itself 

 not improbably originated by a step, although it may have 

 increased in amount later. Since 5. tomentosa and S. latifolia 



