﻿North American Eurhynchia 227 



phyte 1.5-3 mm. high; seta red to red-brown, smooth, slightly- 

 twisted to the right ; capsule brown, inclined, unsymmetric to arcuate, 

 gradually narrowed into the seta, oblong, strongly arcuate and con- 

 tracted under the mouth when dry, with operculum 3-4 x 1 mm. ; 

 annulus of at least two rows of cells ; operculum conic, long ros- 

 trate, about one-half the length of urn ; segments as long as the teeth, 

 split between the articulations ; cilia 2 or 3, well developed, nodose ; 

 spores nearly smooth, 16 tt\ maturing in autumn. 



Type locality, North America ; collected by Bosc, probably in 

 South Carolina. Type in the Boissier Herbarium at Geneva. 



On the ground and rocks in shady places and open fields. 

 Vermont to Florida and Louisiana, west to Missouri and Illinois ; 

 more abundant southward. The only specimen I have seen from 

 Canada was of Drummond's collection and was in Prof. Macoun's 

 collection as from "Upper Canada." Prof. Macoun suggests that 

 it may have been from Niagara Falls. 



Illustrations. Sulliv. Icon. Muse. //. 106. 



Exsiccati. Drum. Muse. Am. (S. States), 132 ; Sulliv. Muse. 

 Allegh. 42 ; Sulliv. & Lesq. Muse, Bor. Am. (Ed. 2) 435, (Ed. 



294; Austin Muse. Appal. 331 ; Ren. & Card. Muse. Am. 



Sept. Exsic. 1 1 7. 



A very striking and easily identified moss, but one which is 

 unique in many respects and whose relationships are obscure. 



Specimens of Myuroclada concinua (Wils.) Besch. communi- 

 cated to Mrs. Britton by Bescherelle have been carefully compared 

 with Hypnum Boscii, Schwaegr. Bescherelle, Ann. des Sci. 

 Nat. VII. 17 : 380, 1893, intimates that the latter species belongs 



My it 



The two 



species resemble each other superficially to a striking degree. The 

 glossy golden yellow turgid branches, rostrate operculum, smooth 

 seta, and very concave cochleariform leaves are marked charac- 

 teristics of both, but under the microscope such important differ- 

 ences appear that I am not able to consider them congeneric. M. 

 concinua has the segments of the inner peristome slender with 

 cilia very rudimentary or none ; annulus lacking ; leaves obtuse : 

 leaf -cells thick-walled, broadly oblong, to oblong rhomboid, 1-2 : 

 Hypnum Boscii has the segments broader: cilia 2 or 3, well 



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