EXPLANATION OF THE PLATES. 



1:30 



OLIGOTKICHUM. 



Generic Chaeactee. 



Dioicous ; barren flower cactus-like ; capsule cylindrical ; calyptra with very 

 few erect hairs. 



Fig. 4. Oligotrichum Hercynium. 

 Hercynian Hair Moss (a) . 



Colour. Dark green. 

 Stems. Short, not branched. 



Leaves (b) . Few, thick in texture, incurved ; lanceolate above, base sheathiug ; 



margin curved inwards ; back of nerve serrated. 

 Flowers and Fruit. Capsule roundish, contracted below the mouth. Summer. 

 Locality. Common on damp banks, &c. 



POGONATTJM. 



Generic Chaeactee. 



Stems usually branched, with an underground stem (rhizoma) ; leaves stiff; 

 base sheathing; nerve strong-. Dioicous. Barren flower, cactus-like; capsule 

 on long seta, rounded, regular ; calyptra covered with hair. 



Fig. 5. Pogonatdm nanum. 

 Dwarf Hair Moss (a) . 



Colour. Dark green. 



Stems. Not branched, short. 



Leaves. Few, incurved, very minutely toothed at the summit, obtuse. 



Flowers and Fruit. Capsule roundish, small ; columella not winged. Autumn. 



Locality. Common on damp banks. 



