﻿North American Eurhynchia 245 



mensions of the leaf-cells. It seems pretty certain that our 

 American plant here referred to E. diversifolium agrees with Lim- 



pricht's idea of this species and it certainly agrees with the acces- 

 sible European exsiccati. While resembling E. strigosum praccox 

 in many ways it can be readily distinguished by its slender habit, 

 smaller branch leaves and more numerous quadrate alar cells. 



5. Eurhynchium PRAELONGUM (Dill. L.) Bryhn, Kxplor. Bryol. in 



Valle Norv. Stordalen, 59. 1893. {Fide Limpricht.) 



Hypnutn re pens filicium, triangularibus parr is foliis praelangum 

 Dill. Cat. Giss. 219. 17 18, et Hist. Muse. 278. pi. 35, f. ij a - 

 1 74 1, et herbarium {Teste Lindberg). 



Hypnutn praelangum L 



Cr. 4: 76./. 2 9 . 1797.) 



rhynchium pseudospt 



1753. (Xon Hedw. St. 



1894. 



Eurhynchium acutifolium Kindb. Rev. Bryol. 22: 84. 1895. 



"Stems (in the type) slender, prostrate, elongated (2-5 inches), 

 divided ; at intervals rather regularly pinnate, with slender, some- 

 what attenuated, often curved, not very crowded, subcomplanate 

 branches ; forming low, somewhat straggling masses of a bright 

 or dull green, less commonly yellowish. Stem leaves distant or 

 more rarely crowded, widely cordate-triangular or widely ovate- 

 cordate, rapidly or even abruptly and longly acuminate in a long 

 often almost filiform, squarrose acumen ; at base wide, excavate, 

 strongly decurrent ; margin plane, regularly and distinctly dentic- 

 ulate, nerve slender, reaching above half-way and usually into the 

 acumen ; cells linear, slightly vermicular, tapering but obtuse, 10- 

 18 times as long as wide, pellucid ; towards base wider and shorter, 

 lax, at angles large, subrectangular, but not forming clearly de- 

 fined auricles. Paraphvllia occasionally but not always present. 

 Branch leaves much narrower, widely or even narrowly lanceolate, 

 gradually acuminate, very acute, somewhat erect when dry, more 

 spreading when moist, not complanate, moderately soft in texture 

 and often twisted when dry, not plicate, hardly glossy. Perichae- 

 tial bracts squarrose, very longly acuminate. Seta rather long, 

 often one inch. Capsule turgidly ovate, narrower when ripe and 

 empty, horizontal, abruptly passing into the seta at base, rather 

 'arge; lid subulate-rostrate, usually declined, almost as long as 

 the capsule. Dioicous." 



The above excellent description is copied from Dixon and 



