﻿North American Eurhynchia 231 



Kindberg, and Dr. Best very kindly called my attention to the 

 great resemblance between the two plants. 



Eurliynchium cliloropterum seems to be nothing more than a 

 slender lighter green form of B. Novae- Angliae, having the branch 

 leaves more narrowly acuminate, more closely appressed and more 

 contorted in drying. The areolation is not wider, and a specimen 

 of Canadian Musci, no. 440 (on which the species appears to be 

 founded), is most certainly dioicous. The perichaetial leaves are also 

 faintly costate, as in the ordinary B. Novae- Angliae. It is found 

 along the northeast coast of North America. Possibly it should 

 be considered a variety. From my studies in this group I am led 



* 



to believe that it is not a rare occurrence for male and female 

 branches to occur on the same plant in a species that is ordinarily 

 dioicous. Vide note on Brachythecium Villardi, Mem. Torr. Bot. 



Club, 6 : 180. 



Mr. D. A. Burnett has communicated a peculiar form of this 

 species from Bradford, Pa., growing on fine sand near the borders 

 of a stream. The whole plant is much reduced and the leaves are 

 more slenderly acuminate than usual. 



2. Bryhnia graminicolor (Brid.). 



1812. 



Hypnum graminieolor Brid. Spec. Muse. 2: 251. 

 Hypnum praelongum var. Sulliv. Muse. Allegh. 44. 

 Hypnum Sullivantii Spruce, A. Gray Man. Ed. 1. 1848. 



1845. 



7: 22. 1893 



J 



1876-77: 354. 1878. 



Gametopliyte slender, in closely intricate mats or cushions, pale- 

 green to yellow-green, dirty -brownish green below, stems 1-2.5 

 cm. long, creeping, irregularly divided and branching, sometimes 

 stoloniferous, sparingly radiculose, often brown and denuded of 

 leaves; branches ascending, 5-10 cm. long, terete-foliate ; branch 



6-0 



5-0 



concave with margins reflexed below, strongly papillose by the 

 thickening of the andes of the cell walls ; median leaf-cells small, 



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linear-oblong, 4-6 : 1 ; quadrate alar cells few ; stem leaves 

 0.75-1x0.4-0.45 mm., longer, and more slenderly acuminate : 

 dioicous ; perichaetial leaves sheathing with spreading points ; the 



