A c OT Y LEDONS . M u sc i . Pterogonium . 129 



cuvvo-patcnt their margins refiexed, the perichsetial ones having 

 their nerve disappearing immediately below their summits, 

 capsule ovate sessile, lid shortly rostrate. Muse. Brit. p. 36. 

 /. 10. 



a. ?iigro-vir?d?s 9 leaves broader blackish green. Gr. apocarpa 



. oj'\mthors. Bryum apoc., Ligktf. p. 71G. 



j3. stricla, stem elongated, leaves narrower reddish. Gr. stricta. 

 Turn. 



HAB. Trees and rocks, common. (3. Alpine rocks. 



2. Gr. maritima, steins short puivinate, leaves lanceolate acumi- 

 nate nearly erect crisped when dry their margins recurved, the 

 perichaetial ones with their nerve running beyond the summits, 

 capsule ovate sessile, lid shortly rostrate. Muse. Brit, p .37 *t. 10. 



HAB. Rocks by the sea-shore. Most abundant in Lorn and Appin, 

 Capt. Carmicliael. 



* * Fruitstalks longer than the leaves. 

 t Fruitstalks curved. 



3. Gr. pnlvinata, stems short pnlvinate, leaves narrow- elliptical 

 their margins recurved their points diaphanous filiform, cap- 

 sule ovate striated, fruitstalks curved, lid conical acuminate. 

 Muse. Brit. p. 38. t. 13. Bryum pulvinatum, Lightf. p. 735. 



HAB. Walls and rocks. 



ft Fruitstalks straight. 



4. Gr. oval a , stems slightly branched, leaves lanceolate- subu- 

 late gradually produced into long diaphanous hair-like points 

 their margins incurved, capsule ovate, teeth of the peristome 

 often perforated and split, lid rostrate. Muse. Brit. p. 39. t. 13. 



HAB. Alpine roo!is. 



5. Gr. Doniana, stems short, leaves lanceolato-subulate pro- 

 duced into long diaphanous hair-like points their margins in- 

 curved, capsule ovate, teeth of the peristome quite entire, lid 

 shortly rostrate. Mwc* Brit. p. 40. t. 10. 



HAB. Rocks in mountainous districts. 



15. PTEROGONIUM. 



Fruitstalks lateral. Peristome single, of 16 entire equidistant 

 teeth. Calyplra dimidiate. Muse. Brit. p. 40. 1.2. 



1. Pt. gracile, branches fascicled curved, leaves broadly ovate 

 acute concave, their margins plane, summits serrated faintly 

 two-nerved at the base, lid conical. Muse. Brit. p. 41. t. 14. 

 Hypnum gracile, Lightf. p. 766. 



HAB. Rocks in subalpine situations, not uncommon. 



2. Pt.jiliforme, sterns irregularly branched curved, leaves ovate 

 subacuminated concave their margins recurved serrated, nerve 

 single or forked short faint, lid conical. Muse. Brit. p. 41. 

 t. 14. 



