ACOTYLEDONS. — Musci. Pterogoniwn. 129 



curvo-patcnt their margins reflexed, the perichaetial ones having 

 their nerve disappearing immediately below their summits, 

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

 /. 10. 



a. njgro-viridis, leaves brooder blackish green. Gr. apocarpa 

 of nuthors. Bryum apoc, IJghtf. p. 716. 



/3. stricla, stem elongated, leaves narrower reddish. Gr. stricta, 

 Turn. 



Hab. Trees and rocks, common. /3. Alpine rocks. 



2. Gr. marilima, stems short pulvinate, leaves lanceolate acumi- 

 nate nearly erect crisped when dry their margins recurved, the 

 perichaetial ones with their nerve running beyond the summits, 

 capsuleovatesessile,lid shortly rostrate. Muse. Br it. p. ^1 .t. 10. 



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

 Capt. Cartnichael. 



* * Frultstalks longer than the leaves. 



t Frultstalks curved. 



3. Gr. pulv'wata, stems short pulvinate, leaves narrow- elliptical 

 their margins recurved their points diaphanous filiform, cap- 

 sule ovate striated, fruitstalks curved, lid conical acuminate. 

 Muse. Brit. p. 38. /. 13. Brijum pulvinatiim, IJghtf. p.'i'6^. 



Hab. Walls and rocks. 



ft Fruitstalks straight. 



4. Gr. ovata, stems slightly branched, leaves lanceolato-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 rocks. 



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. Muse. Brit. p. 40. t. 10. 



Hab. Rocks in mountainous districts. 



15. PTEROGONIUM. 



Fruitstalks lateral. Peristome single, of 16 entire equidistant 

 teeth. Calyptra dimidiate. Muse. Brit. p. 40. t.2. 



1. Pt. graeile, 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. 

 Hyprium graeile, Lightf. p. 766. 



Hab. Rocks in subalpine situations, not uncommon. 



2. Pt.fliforjne, stems irregularly branched curved, leaves ovate 

 subacuminated concave their margins recurved serrated, nerve 

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

 /. 14. 



['] 



