BRYACE^. 31 



Calyptra cucullate-dimidiate. Peristome of 16 



horizontal teeth. 61. Syrrhopodon. 



Tribe VI. TETRAPHIDE^. Plants tnfted. Leaves and areolation 

 nearly as in Brye(B. Peristome composed of tlie cellular part of the 

 lid, divided into 4 broadly lanceolate teeth. 



Caulescent. Calyptra thin, white, reddish at 



apex. 62. Tetraphis. 



Stemless. Calyptra covering the capsule to 



the base. 63. Tetrodontium. 



Tkibe VII. DISCELIE^. Plants gemmiform, very small. Leaves not 

 costate. Capsuje oval, pedicellate. Peristome of 16 simple teeth, 

 split at base. 



Character of the Tribe. 64. Discelium. 



Tribe VIII. SCHISTOSTEGE^. Plants annual, from a colored pro- 

 thallium, delicate, dimorphous; the sterile frondit'orm, with leaves 

 verticillate and confluent at base; the fertile frondiform in the lower 

 part only, with apical flowers and a few minute horizontally tufted 

 leaves. Ca^Dsule small. Peristome none. 



Single genus. 65. Schistostega. 



Tribe IX. SPLACHNE^. Plants and leaves of soft loose texture. Male 

 flowers discoid. Capsule witli an apophysis varying in shape and 

 size. 



* Calyptra mitriform. Apophysis not discolored by age. 



Leaves ovate or spatulate, obtuse. Peristome 

 of 16 short or truncate teetli. (SQ. Dissodon. 



Leaves long, spatulate-acuminate. Teeth of 

 the peristome long, attached below the ori- 

 fice of the capsule. 67. Tayloria. 



* * Calyptra small, conic, entire or cucullate. Apophysis discolored 



by age. 



Leaves more densely reticulate. Teeth solid, 

 bigeminate. 68. Tetraplodon. 



Leaves tufted; areolation very loose. Apo- 

 physis enlarged after maturity, becoming . 

 subglobose and colored. 69. Splachnum. 



Tkibe X. PHYSCOMITIIIE^. Plants short, soft. Leaves large; areo- 

 lation very larj^e, hyaline. Capsule rarely symmetrical, generally 

 cornuous and gibbous. Peristome absent or of 16 teeth, inclined to 

 the right, with an inner membrane divided into irregular segments 

 or rudimentary. 



Calyptra large, tetragonal, enfolding the cap- 

 snie. * ' » ' = 70. Pyramidula. 



Capsule subglobose, splitting in the middle at 

 maturity without decoloration on tlie line of 

 separation. 71. Aphanorhegma. 



Capsule pyriform, regularly dehiscent; orifice 

 narrow. Peristome none. 72. Physcomitrmm. 



Capsule cernuous or pyriform. Peristome of 

 16 articulate teeth. 73. Entosthodon. 



