1923] Evans, — Notes on New England Hepaticae, — XVII 97 



with the environment. The writer, therefore, wonlrl regard S. recurv- 

 ifolia as nothing more than a simple synonym of S. nemorosa. This 

 conclusion is supported by the fact that the ventral leaf-lobes, as 

 brought out by the description, are densely dentate and by the 

 further fact that the gemmae are unicellular and conform closely 

 to the S. nemorosa type. 



In the same paper where Warnstorf described the last two segre- 

 gates he reported the occurrence of the arctic S. spitzbergensis (Lindb.) 

 K. Mull, in Connecticut, basing his record on a specimen collected 

 by the writer at Branford. He intimated also that Muller's S. 

 nemorosa forma purpureolimbata, 1 based primarily on a specimen 

 collected by T. P. James at the Flume, New Hampshire, might be 

 referable to the same species. The writer has examined these two 

 specimens with care and finds that they lack the strongly convex 

 dorsal lobes of S. spitzbergensis and also the coarsely toothed wings 

 on the keels of the leaves; the keels in fact are almost invariably 

 quite entire. There seems to be no reason, therefore, for separating 

 these specimens from S. nemorosa, although they represent an un- 

 usually well-developed form. The only known American station for 

 the true S. spitzbergensis is in Greenland. 2 



5. Lejeunea patens Lindb. Acta Soc. Sci. Fenn. 10: 482. 1875. 

 On trees and wet rocks. Pemetic Mountain trail, (300 ft. alt., Green 

 Mountain Gorge, 800 ft. alt., and Southwest Harbor, 90 ft. alt., Mt. 

 Desert. Maine, July, 1921, A. Lorenz. New to New England. In 

 1902 the writer 3 reported L. patens for the first time from North Amer- 

 ica, citing specimens from Newfoundland and Nova Scotia. It has 

 since been collected in the mountains of North Carolina by Andrews. 4 

 In Europe it is one of the so-called "Atlantic" species, its known 

 range extending along the coast from Norway to Ireland. It is closely 

 related to /.. eavtfolia (Ehrh.) Lindb., so closely in fact that Miiller and 

 others regard it as a " small " species. At the same time it can usually 

 be distinguished without difficulty. It differs, for example, in its paler 

 color; in its more convex leaf-blades, spreading more abruptly from 

 the lobules; in its smaller and more nearly orbicular underleaves; 

 and in the crenulate margins of its leaf-lobes and underleaves. 



1 Rabenborst 's Kryptogamen- Flora 6 2 : 504. 1915. 

 'See Evans, Bryologist 14: 87. 1911. 

 'Mem. Torrey Club 8: 160. 1902. 

 4 See Bryologist 24: 53. 1922. 





