ACOTYLEDONS. — Musci. Didymoaoii, 135 



Hab. Rocks, frequent, 



ft Leaves never diaphanous at their points. 



€. Tr. aciculare, stems elongated branched, leaves lanceolate ob- 

 tuse serrulated at the points, their nerve disappearing below 

 the summit, capsule oblong, lid rostrate. Muse. Brit. p. 62. 

 t. 19. Bryum aciculare, Light/, p. 725. 



Hab. In rivulets, or on very wet stones and rocks. 



7. Tr. J'asciculare, stems elongated branched, leaves lanceolate 

 entire their summits never diaphanous their margins recurved, 

 capsule ovato-ohlong, lid rostrate. Muse. Brit. p. 62. t. 19. 



Hab. Hocks among the mountains. 



8. Tr. poly pliy Hum, stems branched, leaves lanceolate-subulate 

 their margins recurved serrated above very much crisped when 

 dry, capsule oblong, lid rostrate. Muse. Brit. p. 62. t. 19. 



Hab. Rocks and walls in mountainous places. 



J 9. LEUCODON. 

 Fru'Hstalks lateral. Peristome single, of 32 teeth closely united 



in pairs. Calyptra dimidiate. Muse. Brit. p. 63. t. 2. 

 1. L. sciuroides, leaves closely imbricated ovato-cordate acumi- 

 nate striated, capsule oblong. Muse. Brit. p. 63. /. 20. 

 Hab. Trunks of trees, near Dunkekl, rare, G. Don. 

 20. DIDYMODON. 



Fruitsfalks terminal. Peristome single, of 16 or 32 teeth ap- 

 proaching in pairs, or united at the base. Calyptra dimidiate. 

 Muse. Brit.p.G4. t.2. 



* Capsules inclined. 



1. D. purpureum, stems scarcely branched, leaves lanceolate acu- 

 minate carinated their margins recurved entire, capsule ovato- 

 cylindraceous oblique subsirumose furrowed when dry, lid co- 

 nical. Muse. Brit, p. 65. t. 20. Dicramim, Hedw. Bryum 

 purp., Light/, p. 734. 



Hab. On the ground and moist banks, abundant. 



2. D. inclinatmn, leaves bifarious from a sheathing base subulate, 

 capsule ovate inclined, lid conical. Muse ^ Brit. p. 65. t. 20. 



Hab. Rocky places. Near Barrie, Angus-shire, D. Don. 

 ** Capsules erect. 



.3. D.Jlexi/ulium, stems more or less elongated, leaves oblongo- 

 ovate flexuose strongly serrated at the point, capsules erect 

 cylindraceous, lid rostrate. Muse. Brit. p. (36. t. 20. 



Hab. Near Oban, on the ground, Capt. Cannichael. 



4. D. rigidulum, leaves closely imbricated on all sides lanceolate 

 much acuminated carinated with the rigid nerve running be- 

 yond the point, capsule oblongo- ovate erect, lid rostrate. Muse. 

 Brit. p. ^1. t. 20. 



