BAKNES NORTH AMERICAN MOSSES. 193 



§IV. Unguicnlatse. 



[B> c<^8pit08a may be sought here.] 



I. Peristome wanting B. rnbiginosa, 126. 



II. Peristome present. 



A. Teeth straight or scarcely twisted. 



Basal 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, ISS. 



Basal leaf cells elongate-oval B. spadicea, 1S9. 



B. Teeth plainly twisted. 



I. Leaves blunt or mueronate 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. pnrpnrea, 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. nngnicnlata, 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. ariocarpaf] 



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. snltgracilis,^ 1S5, 



1 See Appendix, no. 131. 

 ' See Appendix, no. 136. 



