EXPLANATION OF THE PLATES. 205 



Fig. 16. Hypnum murale. 



Wall Feather Moss (a) . 



Colour. Dark green. 



Stems. Creeping, branches roundish, erect, crowded. 



Leaves (6) . Roundish ovate, suddenly acuminate, serrated, concave, nerve reach- 

 ing half-way. 

 Flowers and Frwit. Monoicous ; capsule ovate, nearly erect, lid short. Autumn. 

 Locality. Walls and rocks. 



Fig. 17. Hypnum tenellum. 



Tender Feather Moss {a) . 



Colour. Eruerald green, silky. 



Stems. Creepiag, branches erect, fasciculate, short. 



Leaves (6) . Subulate, entire ; nerve to more than half-way. 



Floivers and Fruit. Monoicous ; seta short, slender ; capsule ovate, beak curved. 



Autumn. 

 Locality. Walls and rocks, especially chalk. 



Hypnum catenulatum. 



Thread-like Feather Moss. 



Colour. Blackish green. 



Stems. Creeping, pinnate ; branches erect, filiform. 



Leaves (b) . Imbricated, ovate, minute, nerved half-way, margia recurved below. 



Flowers and Fruit. Dioicous; capsule oval-oblong; not known in Britain. 



Summer. 

 Locality. Alpine rocks. 



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