SYNOPSIS OP BRITISH MOSSES. 37 



concave, imbricate ; cells minutely rotund-hexagoaalj 

 at middle base generally linear-oblong, quadrate at 

 sides, rarely all Hnear-hexagonal j per. 1. numerous, 

 elongate. Caps, on a long seta, oval, oblong, cylindric, 

 subarcuate, cernuous and horizontal, lid with a long 

 or short beak, annulus broad, rarely absent. Perist. 

 ext. t. long, from a solid basal lamina densely articulate, 

 reddish-brown, int. membrane broad, processes long, 

 with 3 or 4 filiform cilia. Monoicous or dioicous. 



Tribe xxx. Htpnace^. 



Very variable in size and habit. L. patent, squar- 

 rose, complanate, secund or falcate-secund, soft or 

 scariose, shining or opaque, smooth, rarely papillose, 

 nerved or nerveless, cells mostly narrowly prosen- 

 chymatose, often linear-serpentine, rarely parenchy- 

 matose. Calyptra cucuUate. Caps, erect regular, or 

 cernuous incurved, lid conical or rostrate. Perist. 

 double. 



Fam. 1. Pterygynandriae. 



Primary st. creeping, secondary arcuate, fertile. 

 Br. fasciculate. L. apical cells rhomboid, middle 

 narrowly rectangular or linear, basal angles and 

 margin minutely quadrate ; paraphyllia numerous, 

 minute. Caps, erect, oblong-cylindric, lid conico- 

 rostrate. Perist. small, ext. t. pale, int. a narrow 

 basal membrane with short processes and no cilia. 



110. Pterygynandrium, Bedw. FUiform. L. patent 

 or subsecund, nerved halfway, with long papillae on 

 back. Perist. short, processes imperfect. 



Fam. 2. Orthotheciae. 

 St. and br. prostrate, or dendroid from subterranean 



