'24 SYNOPSIS OF BRITISH MOSSES. 



hexagoiio-rlioniboidj lax or denser. SynoicouSj monoi- 

 cous, or dioicous. Male fl. gemmiform, rarely discoid. 

 Calyptra narrowly cucullate. Caps, inclined or pendu- 

 lous, on a longer or shorter seta, including the neck 

 generally pyriform, regular or slightly curvedj lid 

 convex. Perist. double, ext. t. long, linear-lanceolate 

 or subulate, densely articulate below, strongly hygro- 

 scopic, int. membrane 16-carinate, half as high as the 

 teeth, with carinate processes, and cilia either frag- 

 mentary adherent to the teeth or free, 2- 3-nate, 

 filiform, with appendages at the internodes or articula- 

 tions. 



Tribe xix. Geoegiaceji. 

 PI. csespitose. L. ovate or lanceolate, smooth, nerve 

 thin, cells hexagono-rotund, sparingly chlorophyllose. 

 Caps, erect, oval or cylindric. Perist. of 4 pyramidal 

 teeth. Annulus absent ; lid conical. 



74. Tetraphis, Hedw. {Georgia, Bhr.) Csespitose, 

 erect. L. lower small, remote, upper larger, broadly 

 ovate-lanceolate, basal cells lax, nerve vanishing. 

 Calyptra large, covering half the caps., which is 

 cylindric on a long seta. 



75. Tetradontium, 8chw. PI. small, gregarious. St. 

 short, with flagelliform innovations, and long, linear- 

 clavate, flattish processes. L. few, ovate-lanceolate, 

 entire, almost nerveless. Caps, erect, oval-oblong, on 

 a long rigid seta, lid conical. Perist. as in Tetraphis, 

 but shorter. 



Tribe xx. MNiACEiE. 

 PI. tall, with innovations from the base or beneath 

 floral apex. L. large, with large hexagono-rectangular 

 cells, often bordered and toothed. Male fl. discoid 



