BKYACE^. 



29 



29. 



30. 



Ceratodon. 

 Trichodon. 



Peristome of 8 stort teeth. 28. Octoblepharum. 



Leaves lanceolate-subulate, clasping at base, open, spreading or disti- 

 chous; costa strong, percurrent. Capsule ovate-cylindrical, erect 

 or inclined, long-pedicellate. Teeth of tlie peristome 16, divided to 

 near the base into two equal strongly articulate segments, or irregu- 

 larly split; none in EustirJaa. (Siibtrihe Ceratouoxte^.) 



Leaves strongly costate. Capsule ovate-oblong, 



striate. 

 Leaves long-subulate from an oblong sheathing 



base. Capsule narrow, cylindrical. 



Leaves distichous, subulate from the half- 

 clasping base. 



Leaves distichous, canaliculate-plicate, closely 



unbricate. 32. Eustichia. 



Plants generally minute. Leaves open, narrow. Capsule erect, tumid at 

 the collum, turbinate when dry. Peristome none, or simple, and of 

 16 smooth acute or obtuse teeth. (Subtribe Seligeiue^.) 



Peristome none. 



Plants small. Peristome of 

 without a divisural line. 



31. Distichium. 



33. Anodus. 



16 teeth, solid. 



Plants large. Areolation of the leaves enlarged, 

 orange-colored at the basal angles. 



Plants very small. Calyptramitriform. Teeth 

 hyaline-punctulate. 



Plants small ; pedicel long, slender, geniculate. 

 Teeih subulate. 



34. Seligeria. 



Blindia. 



Brachyodus. 

 37. Campylosteleum. 



35 



36 



Tkibe III. POTTIES. Branches fastigiate by innovations. Leaves 

 with a parenchymatose quadrate-hexagonal areolation. papillose 

 and chlorophyllose in the upper part, dilated and byaline at base. 

 Capsule erect, narrowly oval or cylindrical. Peristome rarely 

 absent, generally of 16 flat membranous teeth, sometimes simple or 

 rudimentary, mostly split to the base into 32 terete filiform 

 obscurely articulate segments. 



Capsule immersed. Peristome none. 



Capsule erect, pedicellate. Peristome none or 

 imperfect, of 16 flat teeth. 



Teeth slender, linear-lanceolate, confluent at 

 base, entire or cleft above. 



Leaves lanceolate-subulate, glossy. Teeth 

 cleft to the base into two linear unequal 

 segments. 



Leaves gradually lengthening from the base 

 upward. Teeth cleft to the base into two 

 equal very papillose, half-terete segments, 

 entire or irregularly interrupted. 



Leaves ovate or obovate. Segments subterete 

 or tetragonal-filiform, free or irregularly 

 transversely connate, erect or slightly twisted 

 to the left. Columella projecting beyond the 

 orifice. 



Teeth divided to the base into long filifornr 

 segments, twisted to the left, borne upon a 

 more or less elongated tessellate membrane. 



38. Pharomitrium. 



39. Pottia. 



40. Didymodon. 



41. Leptotrichum. 



42. Trichostomum. 



43. Desmatodon. 



44. Barbula. 



