14 



Fam. 34. Andreseacese. 

 Leaves often papillose; cells small, the upper short. 

 Capsule blackish. Habit of Grimmia (Schistidium). 



Tribe 3. Cleistocarpous. 



Capsule not dehiscing; lid not distinct. Plants mostly 

 small 



Fam. 35. Bruchiacese. 

 Leaves narrow; cells elongate. Capsule often (princi- 

 pally in American species) necked. Prothallium often per- 

 sistent. Habit of Trematodon and Dicranella. 



Fam. 36. Voitiaoese. 

 Leaves broad, entire and flaccid, smooth; cells large 

 and wide. Capsule without distinct neck. Habit of 

 Splachnum. 



Fam. 37. Physcomitrellaoese. 

 Leaves broad, serrate and flaccid, smooth; cells 

 polygonal, nearly uniform, the upper short. Capsule necked. 

 Calyptra inflate. Habit of Physcomitrium. 



Fam. 38. Phascacese. 

 Leaves generally broad, often entire, not seldom 

 papillose ; upper cells short. Capsule without neck. Habit 

 of PoUia. 



Fam. 1. Cryphseacese 



A. Leaves nerveless, generally entire (or indistinctly 

 sinuolate above). 



1. Hedwigia. Capsule generally terminal, often 

 immersed; peristome none; calyptra submitriform or cucul- 

 late, sometimes hairy. Leaves papillose; upper cells suboval- 

 oblong. Monoecious or synoecious. 



