11 



stomial teeth often entire (or rimose), sometimes cleft. 

 Leaves opake, sometimes papillose. 



Capsule straight, sometimes narrow, without distinct 

 neck. Leaves mostly narrow and not subulate-acuminate, 

 often with hairpoint ; cells small, often with sinuous walls, 

 the upper opake but generally not well-defined from the 

 lower ones; alar (subquadrate) cells not rarely distinct. 



Tufts often dense and pulvinate. Plants not seldom 

 small, generally growing on rocks. 



b. Leaves generally papillose and opake above. 

 Peristomial teeth often contorted. 



Fam. 24. Weisiacese. 



Calyptra cucullate, deciduous. Peristomial teeth mostly 

 without a longitudinal line, sometimes wanting. 



Capsule generally straight, often narrow, without (exc. 

 Dermatodon) prominent neck; teeth either partite to the 

 basal tube or deeply cleft, less often entire. Leaves mostly 

 broad, often crisped when dry; upper cells very small, 

 well-defined from the lower ones; alar cells not distinct 

 or forming a margin near the base; cellwalls (exc. Gehee- 

 bia) not sinuous. Tufts often loose. Plants mostly gro- 

 wing on earth and stones, often sterile. 



Fam. 25. CalymperaceBe 



Calyptra persistent, dehiscing with longitudinal slits 

 above, constricted below the unripe capsule. Peristome 

 none. 



Capsule straight and oval without neck. Leaves 

 narrow and convolute, crisped or cirrate in dry state; 

 upper cells very small. Tufts often loose. Plants growing 

 on trees, rarely fruiting. 



Subtribe 4. Diplostorase. 



Peristome generally double. 



Section 1. Stenolepidew. Endostomial segments nar- 

 row, rarely confluent above. Peristomial teeth articulate. 

 Leaves not complicate. 



