BARNES — NORTH AMERICAN MOSSES. 



201 



Alar cells of leaf quadrate 

 Annulus none 



E. micropns, 199. 

 S. speciosum, SOI. 



COSCINODON, p. 154. 



Costa not entering the hyaline point, which is less than 

 the leaf in length. 

 Dioicous, leaves oblong lanceolate . . . C. pulyinatus, 154. 



Autoicous, leaves obovate C. Raui,^ 155. 



Costa forming a rough hyaline point twice as long as the 



leaf C. Wrightii, 155. 



PTYCHOMITRIUM, p. 156. 



Plants large (3 cm. +), leaves acuminate, sharply dentate P. Gardner!, 156. 

 Plants small (1 cm. — ), leaves not acuminate, nearly or 

 quite entire. 

 CoUum none. 

 Teeth subulate (1 : 10), entire . . . .P. IncurTum, 157. 

 Teeth lanceolate (1 : 4), bi- or trifid . . .P. Drummondii, 157. 

 CoUum equalling one-third sporangium . . .P. pygmsenm, 157. 



AMPHORIDIUM, p. 158. 



Leaf margins plane, entire A. Lapponicnm, 158. 



Leaf margins recurved or revolute. 

 Leaves remote, recurved-spreading, serrate . A. Sallirantii, 159. 

 Leaves close. 

 Costa excurrent, seta arcuate ... A. Californicum, 159. 

 Costa vanishing below apex. 



Entire A. Mongreotii, 159. 



Serrulate A. csespitosum, 160. 



ZYGODON.' 



Capsule without a peristome 

 Capsule with double peristome 



Z. Tiridissimus, S07. 

 Z. conoideus, SOS. 



1 Inclading C. Renauldi Card,, Bot. Gaz. 15: H, 1890. 

 3 See appendix, no. 206. 



