EXPLANATION OF THE PLATES. 



179 



Plate XXVIII. 

 FILICOIDEI. 



Mosses with leaves, in two rows, flat on each side of the stem. (Figs. 1 b, 2 b) . 



FlG. 1. SCHISTOSTEGA PENNATA. 



Cavern Moss (a) . 



Colour. Emerald green. 



Stems. Very short, in dense patches; annual, from a perennial thallus (see 

 DisceUwm) . 



Leaves (b) . Two ranked, oval-rhomboid, joined tog-ether at their bases ; the 

 lower thread-like ; areolae very large ; plant not hygroscopic. 



Flowers and Fruit. Dioicous ; capsule (c) very small, round, erect, mouth wide ; 

 peristome none, lid convex. Spring. 



Locality. Moist banks and caverns. 



FISSIDENTE^S. 



Fig. 2. Characteristics oe Order. 



Plants small, in patches ; capsule on long slender seta, various, lid beaked ; 

 peristome (a) of sixteen deep red teeth, divided more than half way, with many 

 bars, strongly hygroscopic. Leaves two ranked, flat on each side of the stem 

 (bifarious) . (See Dicranum) . 



1. Fruit Terminal. 

 Fig. 3. Fissidens exilis. 

 Slender Flat Moss (a) . 



Colour. Dark green. 

 Stems. Very short. 



