10 
a. Leaves generally not papillose (exc. some specie 
of Grimmia and Racomitrium). Peristomial teeth no 
contorted. 
aa. Peristomial teeth with a longitudinal line. 
Fam. 20. Splachnacez. 
Calyptra conie or subcucullate, very small. Peristo 
mial teeth generally entire, seldom finally split. Leaves 
smooth, flaccid and faintly hygroscopic. 
Capsule straight with a swollen neck or an umbra 
culiform appendage (apophysis) Leaves broad; cells usually | 
pellucid and large, the alar ones not defined. Plants often - 
robust, usually growing on animal dung or rotten animals,  . 
rarely on rocks or trees. 
Fam. 21.- Dicranacesz. 
Calyptra cucullate, large or long. Peristomial teeth 
generally cleft. Leaves not flaccid, sometimes mamillose. 
Capsule often curved, generally narrow. Leaves 
mostly narrow and subulate-acuminate, often setiform; cells . 
more or less pellucid, the alar ones often dilated and sub- 
quadrate. Tufts usually compact and very radiculose. - 
Plants often robust, growing in swamps and woods, less E 
often on rocks or trees. | | 3 
b b. Peristomial teeth without longitudinal line. 
Fam. 22. Seligeriacece. e 
Calyptra cucullate. Peristomial teeth not cleft. Leaves 
smooth, not opake. e v ds 2 
Capsule straight, short and thick. Leaves generally 
setiform and subulate-acaminate without hairpoint; cells 
. more or less pellucid, the alar ones sometimes (in Blindia) 
dilated and subquadrate, often not defined. Plants mostly 
small and not densely (exc. Blindia) tufted, growing on 
rocks, ter o ine ru U 
. Calyptra mostly mitriform, sometimes cucullate. Peri- 
