146 DIPLOPERISTOMI. [Bartramia. 



the extremity ; and what is more remarkable, the nerve, when it 

 reaches about half way from the base, dilates and unites with 

 the substance of the leaf. Hence it becomes thick and rigid, 

 remaining nearly as straight when dry as when wet, which is 

 never the case with the preceding species. This conformation 

 of the leaf is not represented in the figures of Schwaegrichen ; 

 and most of those of the plant itself are so much larger than 

 the individuals we have seen, that we cannot help quoting his 

 synonym with a mark of doubt. 



3. B. gracilis ; stems elongated, leaves recurvo-patent lanceolate 



canaliculate serrated, fruitstalks lateral from innovations. 

 (TAB. XXIII.) 



Bartramia gracilis. FlVrke in Schrad. Journ Smith, Fl Brit. p. 

 1341. Engl. Bot. t. 1826. Hook. Fl. Scot. P. II. p. 140. Drum- 

 mond, Muse. Scot. v. 1. n. 70. Am. Disp. Muse. p. 40. 



Bartramia CEderiana. Swartz, in Schrad. Journ. 



Bartramia CEderi. Schwaegr. Suppl. v. 1. P. II. p. 49. t. 59. 

 Moug. et Nestl. n. 326. Funck, Deutschl. Moose, t. 24. / 3. 



Bartramia longiseta. Brid. Meth. p. 116. 



Bartramia grandiflora. Brid. Meth. p. 116. Schwaegr. Suppl. v. 

 1. P. II. p. 48. t. 58. 



HAB. Rocks in alpine districts. 



This, like most of the other individuals of the genus, varies 

 considerably in length, from one or two, to even three inches. 

 It is known by its deep colour, its short, patent, or recurved, 

 and rather distantly placed leaves, and by the fruitstalks, which, 

 owing to the innovations of the stems, have a lateral appear- 

 ance, and scarcely exceed the tops of the branches. B. longiseta 

 of Bridel, is, we believe, generally acknowledged to be the same 

 with our plant ; and we are unable to detect any essential point 

 of difference in the American B. grandiflora of Schwaegrichen. 



4. B. fontana ; stems fastigiate, leaves closely imbricated rigid 



erect broadly ovate or lanceolate acuminated nearly plane 

 serrated, fruitstalks lateral from innovations. (TAB. XXIII.) 

 . major , stems from three to six inches in length ; leaves broadly ovate 

 acuminate. 



Bartramia fontana. Swartz, in Schrad. Journ. Turn. Muse. Hib. 

 p. . 107. Moug. et Nestl. n. 36. Hook. FL Scot. P. II. p. 140. 

 Hobson, Brit. Mosses, v. 1. n. 61. Drummond, Muse. Scot. v. I. n. 68. 



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