BARNES — NORTH AMERICAN MOSSES. 193 



§IV. Unguiculatae. 



[B. ctespitosa may be sought here.] 



I. Peristome ivanting B. rnbiginosa, 126. 



II. Peristome present. 



A. Teeth straight or scarcely twisted. 



Easal leaf cells rectangular. 



Teeth cancellate B. cancellata, 122. 



Teeth nodose, separate. 



Leaves long lanceolate, costa dark . . . B. rigidnla, 123. 



Leaves ovate lanceolate, costa pale . . B. sparsidens, 133. 



Basal leaf cells elongate-oval B. spadicea, 139. 



B. Teeth plainly twisted. 



I. Leaves blunt or m,ucronate by the excurrent costa. 



Leaves short, ovate, the very apex obtuse. 

 Capsule cylindric, calyptra reaching middle . B. brachyphylla,^ 123. 

 Capsule ovate, calyptra reaching base . . B. purpurea, 123. 



Leaves longer, narrower, sharp pointed. 

 Cells at base rectangular and pellucid. 

 Teeth twisted 2-3 times, purple or red. 



Capsule oblong-elliptic to subcylindrical, sub-in- 

 curved ...... B. ungniculata, 120. 



Capsule oblong, small, erect ... B. Jooriana, 120. 



Teeth once loosely twisted, pale . . B. tortellifolia, I44. 



Cells at the base quadrate, chlorophyllose . B. Cruegeri, 122. 



2. Leaves gradually pointed. 



a. Leaves not papillose [incl. B. artocarpaf] 



Leaf border plane. 



Annulus none, teeth reddish B. gracilis, 127. 



Annulus large, simple, persistent, teeth whitish B. artocarpa, 126. 



Leaf border reflexed all around or revolute below. 



Leaves long-subulate, costa percurrent or excurrent, 



red B. suftgracilis,^ 135, 



1 See Api)endix, no. 131. 

 ' See Appendix, no. 136. 



