ACOTYLEDONS. MUSCI. PhaSMim. 121 



2. A. rupestris, steins branched, leaves ovate gradually acumi- 

 nated, the upper ones falcate. Muse. Brit. p. 2. 1. 8., JUIL- 

 germannia rupcstris, Ligktf. p. 787. 



HAD. Rocky mountains, not unlrequent. 



** Leaves furnished with a nerve. 



3. A. Rothii, stems almost simple, leaves lanceolato-suhulate 

 falcato-secund fragile, perichaetial ones oblong nerveless their 

 margins involute. Muse. Brit, p. 2. t.8. 



HAS., Alpine rocks, not rare. 



4. A. nivalis, steins slightly branched, leaves loosely imbricated 

 lanceolate subfalcate secund, perichaetial ones similar to the 

 cauline ones. Muse. Brit. p. 2. t. S. 



HAD. Rocks upon the highest summit of Ben Nevis, on the eastern 

 side, Hook. 



2. SPHAGNUM. 



Receptacle pedunculated, its peduncle resembling a fruitstolk. 

 Capsule sessile, entire, its lid deciduous, its mouth naked. 

 Calyptra irregularly torn. Muse. Brit. t. 1. 



1. S. obtusifoL'mniy branches tumid, leaves ovate obtuse. Muse. 

 Brit. p. 3. t. 4. 



HAB. Bogs, common. 



2. S. squarrosum, branches attenuated at their extremities, leaves 

 ovato-acuminated squarrose recurved. Muse. Brit. p. 4. t. 4. 



HAB. Arlary, Mr. Arnott, in ft-. Ravelrig-toll, and near N. Queens- 

 ferry, Mr. Greville. Marshes, near Glasgow, D. Don. 



3. S. acutifolmm, branches attenuated, leaves ovato-lanceolate 

 crowded. Muse. Brit. p. 4. t. 4. 



HAB. Bogs, plentiful. 



4. S. cuspidatum, branches attenuated, leaves lanceolate-subu- 

 late lax MILSC. Brit. p. 4. t.4. 



HAB. Growing in the water in boggy places. 



3. PHASCUM. 



Pruitstalks terminal. Zz'dpersistent. Calyptra dimidiate. Muse, 

 Brit. t. 1. 



* Shoots creeping ; leafless., articulated, branched. 



1. Ph. serratum, shoots branched conferva-like, perichaetial leaves 

 lanceolate serrated nerveless. Muse. Brit. p. 5. .5. 



HAB. Wall top, opposite Blair Adam, Kinross-shire, Mr. Arnott. 

 Pastures, Angus-shire, and marshes on Braid hills, G.Don. 



** Creeping shoots none,. 

 f Leaves more or less subulate. 



2. Ph. crispum, leaves lanceolato-subulate flexuose crisped when 

 dry. Hook. & Tayl. Muse. Brit. p. 6. t. 5. 



HAB. Scotland, G. Don. Caroline park, on the ground, Mr. Arnott. 



3. Ph. subidatum, leaves subulato -setaceous straight their nerve 



