EXPLANATION OF THE PLATES. 187 



Leaves (5) . Imbricated ; ovate-apiculate, serrate above^ margins plane, two- 

 nerved at the base. 

 Flowers and Fruit. Dioicous ; capsule large, oblong; lid conical. Winter. 

 Locality. Very common in momitain. districts. 



ISOTHECIUM. 



Capsule erect or iacUned ; seta long ; peristome double ; outer of sixteen teeth, 

 marked with a line down the middle ; inner a membrane divided half way iato sis- 

 teen processes, with cilia between them. 



Fig. 4. Isothecium mydeum. 



Blunt-leaved Tree Moss (a) . 



Colour. Yellow green. 



Stems. Two inches high, with stolons near the base, branches fasciculate ; 



incurved. 

 Leaves (b) . Ovate-oblong ; serrate above, margin recurved below ; nerve ceasing 



half way ; those of the perich^tium erect. 

 Flowers and Fruit. Dioicous; capsule oval, erect, or nearly so, beak rostrate; 



seta long. Autumn. 

 Locality. Rocks and trees. 



Fig. 5. Isothecium myosueoides. 



Acute-leaved Frond Moss {a) . 



Colour. Yellow green. 



Stems. Slender, fasciculate ; branches in a thick tuft, incurved. 



Leaves {b) . Ovate-acuminate, serrated ; nerved to above the middle ; those of 



the perichsetium recurved. 

 Floivers and Fruit. Dioicous ; capsules erect or incliaed, abundant; seta curved. 



Winter. 

 Locality. On trimks of trees and rocks, spreading ia large patches, and very 



common. 



