﻿North American Eurhyxchia ' 253 



An exceedingly variable and perplexing species. The papillose 

 character of the leaves is of no value whatever as a distinction, as 

 the leaves of European E. myosuroides are frequently papillose and 

 this character varies even on leaves of the same plant. I have seen 

 type specimens oiHypnum acuticuspis Mitt, and Hypnum spiculifcrum 

 Mitt. The specimens of 77. spiadiferum were larger and had larger, 

 longer acuminate, more strongly acuminate leaves on the second- 

 ary stems than is usually the case with E. sto/omferum, but there 

 were two well developed cilia with rudiments of a third. It ap- 

 pears to be a well-developed form of E. stoloniferum. Isotliecium 

 pleurozoides is a broad leaved form varying in the direction of var. 

 tnyurcettum. 



E. stoloniferum differs from E. myosuroides in its larger size, 

 more frequent and better developed flagellate branches, in the 

 longer branch leaves with a broader and more gradually narrowed 

 acumination, and broader and longer median cells. The stem 

 leaves also are slightly rounded at the basal angles, as broad as 

 long and narrowed to a comparatively long slender acumination. 



9a. EuRHYNcminr stoloniferum Cardoti (Kindb.). 



Isothecium Cardoti Kindb. Bull. Torr. Bot. Club, 17 : 278. 

 [S90. ' 



Bright glossy yellow-green ; secondary stems irregularly pin- 

 nately branching, 5-10 cm. long, sometimes bearing long rigid 

 nagellae at the ends ; branch leaves reaching 3 mm. in length by 

 0.7 mm. in breadth. 



A beautiful variety representing the maximum development of 

 e species. So large and striking is it in appearance that at first 

 sight one feels that it must surely be a distinct species, but there is 

 a whole chain of common and intermediate forms. The species 

 itself is one of the most variable species known to me, thus making 

 1 impossible to base a distinct species on a form whose principal 

 difference is mere size. It is possible that E. stoloniferum itself 

 should be regarded as a subspecies of E. myosuroides, but some 

 specific lines seems imperative between such divergent forms as 



th 



the European E. myosuroides and Isothecium Cardoti Kindb. 



I vpe locality, Hastings, B. C. On base of trees and logs. 

 Victoria, Vancouver Id.; Washington. 



Exsiccati. Macoun, Can. Muse. 394. 



