114 



BRITISH MOSSES. 



Fig. 3. Schistidium peuinosa. 

 Black Grimmia (a) . 



Colour. Blackish. 

 Stems. Branched, tufted. 



Leaves (b) . With long white hair points, erect, spreading, very thickly crowded. 

 Capsule. Very small, completely hidden by the leaves. Spring (?) . 

 Locality. Near Largo, Scotland, 1864. Mr. Wilson. 



Fig. 4. Schistidium apocaepum. 

 Sessile-fruited Grimmia (a) . 



Colour. Brownish. 



Stems. In loose tufts ; branches long and very much forked. 

 Leaves (b) . Base broad, ovate-lanceolate above, with white points. 

 Capsule. Of stout texture, elliptical ; annulus, none. Winter. 

 Locality. Rocks and walls. 



Varieties. Gracile (c) . — Stems longer, leaves following each other (secund) . 



Bivulare (d) . — Dark green, leaves wide, ovate-lanceolate, obtuse. By streams. 



Fig. 5. Schistidium maritimum. 

 Sea-side Grimmia (o.) . 



Colour. Greenish brown. 

 Stems. In round, thick tufts. 



Leaves (b) . Crowded, long, incurved when dry, lanceolate ; nerve excurrent. 

 Capsule, Annulus, none ; teeth large, longer than in the other species, and very 



abundant. Autumn and Winter. 

 Locality. One of the few mosses found on rocks exposed to the sea ; very rare 



on calcareous rocks, but abundant on slate, where its round, thick tufts 



mark it at once. 



