134 



BRITISH MOSSES, 



Plate XIX. 



ZYGODONTIEiE. 



Fig. 1. Characteristics oe Order. 



Capsule (a) pyrifornx, erect, striated; with an apophysis, either immersed or on 

 a long seta. Lid with very long- beak. Peristome variable, wanting, single, or 

 double, the teeth of the outer thirty- two, but united into sixteen or eight ; the inner 

 peristome, composed of cilia, alternates with these. Calyptra very small ; areola? 

 small and round (guttulate) ; leaves lanceolate, the margins never recurved. 

 Plants tufted, on trees and rocks. 



(a) . Peristome none. 

 Fig. 2. Zygodon Lapponicus. 

 Lapland Yoke Moss (a) . 



Colour. Yellow green. 



Stems. Tufted, branched, thickly covered with roots (radiculose) . 



Leaves (b) . Spreading, linear-lanceolate, broad below, crisped when dry ; the 



nerve not reaching to the point. 

 Flowers and Fruit. Monoicous. Seta short; capsule eight-ribbed ; mouth wide ; 



peristome none. Summer. 

 Locality. Crevices of rocks. 



Fig. 3. Zygodon Modgeottii. 

 Mougeot's Yoke Moss (a) . 



Golour. Brownish. 



Stems. Much branched, long, sparingly beset with roots. 

 Leaves (b) . Spreading, long, linear-lanceolate ; nerve reaching to the apex. 

 Flowers and Fruit. Dioicous. Capsule round; fruit very rare. Summer. 

 Locality. Common on moist rocks in a barren state. 



