SYNOPSIS OF BRITISH MOSSES. 7 



Tribe vi. Leucobetacb^. 

 PI. whitish, spoDgiose, soft when moist, fragile when 

 dry. Leaf cells dimorphous, narrow and chloro- 

 phyllous, broad, empty, and porose. 



20. Leuoobryum, Hampe. L. erecto-patent and se- 

 cund, concave, from an erect base, lanceolate. Caps, 

 cernuous, incurved, ovate and oblong, striate, deeply 

 sulcate when dry, neck shortly strumose, annulus 

 absent, lid subulirostrate. Perist. as in Dicranum. 

 Spores small, globose, reddish. Dioicous. 



Tribe vii. Pissidentace^. 

 PI. small, slender. L. distichous, with a conduplicate 

 dorsal wing, nerve excurrent, or ending in apex, cells 

 minutely parenchymatous, very chlorophyllose. 



21. Fissiiens, Hedw. St. simple or slightly branched. 

 Caps.symmetricor obliquely incurved, erect or cernuous, 

 lid large, with a long or short beak. Perist. simple, of 

 16 teeth, lineal-lanceolate, unequally bifid, densely 

 articulate at base, vertically striolate and punctulate, 

 crura filiform, horizontally inflexed when dry. Annu- 

 lus narrow. Spores small, smooth. 



Tribe viii. SELiGEEiACEiB. 

 PI. very small, with innovations from below the 

 floral apex. L. narrow, nerved, smooth, apical cells 

 minutely quadrate, basal rectangular. Caps, erect, 

 symmetric, rarely gymnostomous. Perist. t. 16, more 

 or less perfect. 



Fam. 1. Seligerise. 

 Calyptra cucuUate. Caps, subglobose, wide-mouthed, 

 with a distinct neck. 



22. Seligeria, B. and S. L. lower small, remote, 



