140 ACOTYLEDONs. — Musci. Hookcvia, 



a. minor ^ stems short, leaves flexuose. B. pomlformis^ Hedw. 

 /3. major, stems much lengthened and branched, leaves longer 



crisped especiallv when dry. B. crispa, Swartz. 

 Hab. Heaths and dry banks, p. Principally in subalpine countries. 



2. B. ithypkyllu; stems short, leaves rigid erecto-patent subulato- 

 setaceous almost entire, the nerve half way up passing into 

 the substance of the leaf, straight when dry, fruitstalks much 

 elongated. Muse. Brit. p. 86. t.2'd. 



Hab. Dry banks, principally in mountainous situations. Ben Lomond ; 

 banks in Sutherland, and on Ben Luyal, Hook. Ben Lawers, &c., 

 G. and D. Don. 



3. B. gracilis, stems elongated, leaves recurvo-patent lanceo- 

 late canaliculate serrated, fruitstalks lateral from innovations. 

 Muic. Brit. p. S6. ^23. 



Hab. Rocks in alpine districts, not uncommon ; especially in wet 

 places';" by cascades. 



4. B. Jontana, stems fastigiate, leaves closely imbricated rigid 

 erect broadly ovate or lanceolate acuminated nearly plane ser- 

 rated, fruitstalks lateral from innovations. Muse. Brit. p. 87. 

 t, 23. Mniuvijontanum., Lightf. p. 709. 



a. major, stems from 3 — 6 inches in length, leaves broadly 



ovate acuminated. B. fontnna, Swartz. 

 j3. marchica, stems from half an inch to an inch in length, leaves 



lanceolate acuminated. B. marchica, Swartz and E. B. 

 Hab. Marshy and boggy places, frequent, p. Clova hills, D. Don. 



** Fruitstalks very short, curved. 



5. B. Halleriajia, stems much elongated proliferous, leaves long 

 subulate flexuose serrated above^ fruitstalks lateral from iimo- 

 vations very short curved. Muse. Brit. p. 87- 1. 23, Bryum 

 Laterals, Lightf. p. 7 27 . 



Hab. Crevices of rocks in alpine situations, abundant. 



6. B. arcuata, stems much elongated proliferous, leaves hori- 

 zontally patent ovato-lanceolate acuminated serrated striated, 

 fruitstalks very short arcuate at length lateral, capsule nearly 

 smooth. M21SC. Brit. p. 88. t. 23. 



Hab. Rocks and banks in the Highlands, not uncommon. Abundant 

 along the shores of Loch Lomond. Ben Lawers and Clova, G. Don. 

 Moist heathy ground. Lorn and Appin, Capt. Carmichael. Cathil 

 Muir, Kinross-shire, rare in fr., Mr. Arnott. Pentland hills^ with- 

 out fr.j Mr. Greville. 



29. HOOKERIA {Smith, not Scfiwcegr.). 



Fruitstalks lateral. Peristome double; the exterior of 16 teeth, 

 the interior of a membrane divided into 16 entire segments. 

 Calypira mitriform. Muse. Brit. p. 89. t. 3. 



