BARNES — NORTH AMERICAN MOSSES. 



215 



Upper leaf cells sublinear 

 Seta 1 cm. long, capsule 1.2 : 2 

 Costa short excurrent or percurrent. 

 Leaves not bordered .... 

 IJeaves bordered. 

 Decurrent, seta 1 cm. long 

 Decurrent, seta 2-3 cm. long 

 Not decurrent. 

 Costa excurrent, leaves reddish, margin scarcely 



revolute B. pnrpnrascens, 224, 



Costa vanishing or barely excurrent, margin 



strongly revolute B. lacustre, 226, 



[-B. flexuosum may be sought here.] 



B. Froudei, ^8^. 

 B. Archan^elicnm, ^87. 



. B. EnOT?ltoni, 29^. 



B. brachynenron, S86. 

 B. Labradorense, S89. 



C. Dioicous. 

 Collum smooth or rugose when dry. 

 Endostome adherent to peristome, cilia none 

 Endostome free, cilia present. 

 Costa percurrent, teeth bright purple 

 Costa short excurrent, teeth orange 

 Collum longitudinally sulcate when dry. 

 Leaf cells pitted, periohaetial leaves costate, 

 I«af cells not pitted, inner perichaetial leaves ecostate 



B. flexnosnm, 227. 



B. Galifornicnm, 237. 

 B. snbpurpurascens, £8S. 



B. ceneam, S94, 

 B. fallax, S93. 



§11. Eubryum. 



A. Synoicous. 

 Costa not excurrent. 

 Leaf margin serrate above, apex straight 

 Leaf margin entire, apex recurved 

 Costa excurrent into a smooth point. 



Margins recurved 



Margins plane 



Costa excurrent into a serrate point. 

 Leaves not decurrent, long cuspidate. 

 Not bordered, entire .... 

 Not bordered, serrate or denticulate above B. 

 Bordered ...... 



B. Oregannm, 230, 

 B. nitldnlnm, 305. 



B. torquescens,^ 230. 

 B. microsteginm, SOS. 



. B. intermedium,* 228. 



synoico-caespiticiam, S16. 



B. cirrhatnm,° 228. 



1 See Appendix, no. 344. On account of the imperfect description 1 cannot place 

 B. sanguilentum in the Key. 

 ' See Appendix, no. 295. 

 ' See Appendix, no. 296. 



