136 BRITISH MOSSES. 



TETRAPHIDE^. 



Fig. 7. Chaeactbkistics op Oedee. 



Capsule on loBg seta^ ereot^ regular, sub-cylindrical ; peristome united to the 

 columella, divided into four teeth, which are marked with longitudinal lines ; 

 calyptra mitriform. Plants perennial, in very thick patches on banks, and about 

 the roots of trees. Stems much crowded, leaves small below. 



Pig. 8. Teteaphis pellucida. 



Felhicid Four-tooth Moss (a) . 

 Colour. Dark green. 



Stems. In thick patches, branched, radiculose below, slender. 

 Leaves {b) . Small below, larger above, ovate-lanceolate, three-ranked. 

 Floivers and Fruit. Monoicous. Barren flower on a branch growing out of a 



female flower; capsule on long pedicel, with a red border at the mouth. 



Autumn. 

 Locality. In shady places, roots of trees, &c. 



Fig. 9. Teteodontium Beownianum. 



Mr. Brown's Moss {a) . 



Colour. YeUow green. 



Stems. Scarcely any, branches none. 



Leaves (b) . Few, very long, linear, those of the perichaetium ovate-acuminate. 



Flowers and Fruit. Monoicous. Seta long, reddish; capsule oval; calyptra 



large. Summer. 

 Locality. Eocks in the north of England. 



This is a singular species, almost without stem ; the true leaves probably being 

 those of the perichEetium, the very long lower leaves being intermediate between 

 branches and leaves. The only affinity between TetrapJds and Tetrodontium is in 

 the structure of the peristome. 



