174 



BRITISH MOSSES. 



Plate XXVII. 



OREADEiE. 



The typical form of the order is unknown in Britain ; its only represen- 

 tative is — 



Fig. 1. Catoscopium nigritum. 



Down-looking Moss (b) . • 



Colour. Yellow green. 



Stems. Slender, tufted, with innovations, radiculose. 

 Leaves (c) . Lanceolate, spreading ; areolae small. 



Flowers and Fruit. Dioicous. Seta slender; capsule (a) round, furrowed, 

 shining, horny, neck suddenly bent, mouth oblique ; peristome single, of 

 sixteen barred teeth. Spring. 



Locality. Moist rocks. Rare. 



DISCELIE^. 

 Fig. 2. Discelium nudum. 

 Naked Moss (b) . 



Colour. Dark green. 



Stems. Hardly any, the plant springing from a film (thallus) ; plants in large 

 patches. 



Leaves. Very few, lanceolate-ovate, imbricated, transparent (diaphanous) . 



Flowers and Fruit. Dioicous (?),both male and female plants having apparently 

 the same rhizoma. Seta long, succulent, white ; capsule (a) roundish, suc- 

 culent, neck suddenly bent ; peristome single, of sixteen teeth, lanceolate, 

 barred, cleft half way. 



Locality. Springing annually in immense patches upon clay banks in the north 

 of England. 



