26 SYNOPSIS OF BRITISH MOSSES. 



Fam. 3. Timmiae. 



Innovations from below floral apex. L. elongate- 

 lanceolate from a sheathing base. PL nionoicous, 

 gemmiform. Caps, horizontal or inclined, oval, oblong, 

 lid convex. Perist. double, internal a plane basal 

 membrane with numerous cilia. 



79. Timmia, Hedw. L. all equal, elongate-lanceolate, 

 nerve strong, cells upper minutely hexagono-rotund, 

 basal lax, hexagono-rectangular. Caps, ovate or ob- 

 long, smooth or obsoletely striate. Perist. outer t. 

 when dry geniculato-incurved, cilia of inner nodoso- 

 filiform. 



Tribe xxi. BuxBAOMiACEiE. 



PI. small, almost stemless, producing a large, oblique, 

 ventricose capsule, sessile or on a thick seta. Calyptra 

 small, conical. Perist. double, external more or less 

 perfect, internal a conical, twisted, plicate membrane. 



80. Buxbaumia, Sailer. PL small. L. ovate and 

 oblong-lanceolate at base of seta, margin grossly 

 dentate, nerveless, areolae lax. Caps, very large, on a 

 rough, fleshy seta, oblique, convex on one side, flattish 

 on the other or upper, ventricose, lid conical, obtuse. 

 Calyptra very small, covering only the lid. Outer 

 perist. of 3 — 4 layers of cellular tissue, divided into 

 irregular or moniliform reddish teeth, inner a pale, 

 plicate, twisted, conical membrane. 



81. Diphyscium, W. and M. St. short, simple. L. 

 Ungulate, almost entire, spreading, flexuose, nerved, 

 margin plane, entire, or slightly denticulate at apex ; 

 areolae granular, opaque ; per. 1. longer, lanceolate, the 

 aristate apex divided or ciliate. Caps, sessile, ovate- 

 conical, ventricose, oblique, gibbous below. Perist. 



