54 APLOPERISTOMI. [Tortula. 



species of the genus Tortula, which has led some Botanists to 

 refer it to Trichostomum ; but the . fringe is decidedly twisted, 

 both in our specimens and those of Mougeot and Nestler ; and 

 Schultz, not being acquainted with our T. rigida, has considered 

 us, in the first edition of this work, to have fallen into an error 

 in describing the leaves as nerved. 



C. Leaves thin, nerved. 

 Leaves. 1. Tfiose of the perichcetium convolute. 



4. T. convoluta ; stem rather short, leaves oblongo-lanceolate 



acute their margins plane those of the perichsetium remarka- 

 bly convolute, capsule oblong, lid rostrate. (TAB. XII.) 



Tortula convoluta. Swartz, Muse. Suec Smith, Fl. Brit. p. 1253. 



Engl Bot. t. 2382. Turn. Muse. Hib. p. 149. Hobson, Brit. Mosses, 

 v. 2. n. 19. Drummond, Muse. Scot. v. 1. n. 23. Hook. Fl. Scot. P. 

 II. p. 128. Arn. Disp. Muse. p. 37. 



Barbula convoluta. Hedw. St. Cr. v. 1. p. 87. t. 32. Schultz, in 

 Nov. Act. Acad. Cas. v. 11. p. 214. t. 213. Moug. et Nestl. n. 716. 

 Funck, Deutschl. Moose, t. 15. /. 6. Schwaegr. Suppl v. 1. p. 127. 

 Brid. Meth. p. 94. 



Bryum convolutum. Dicks. 



Bryum setaceum. Huds. Dill. Muse. t. 48. j 44. 



HAB. Banks and tops of turf walls, not uncommon in the 



subalpine parts of the kingdom. 



The perichsetial leaves of this plant are strikingly convolute ; 

 the hue is yellowish ; the fruitstalks pale like those of Didymo- 

 don pallidum. 



5. T. revoluta; stem short, leaves lanceolate acute their margins 

 remarkably revolute those of the perichsetium sheathing in- 

 volute, capsule oblong, lid rostrate shorter than the capsule. 



Tortula revoluta. Brid. in Schrader's Journ. an. 1800. v. 1. p. 299. 

 Drummond, Muse. Scot. v. 2. n. 22. Hook. Fl. Scot. P. II. p. 127. 

 Arn. Disp. Muse. p. 37. 



T. nervosa. Smith, in Engl Bot. t. 2383. 



Barbula revoluta. Mohr Schwaegr. Suppl. v. 1. p. 127. t. 32. 

 Brid. Meth. p. 95. Schultz, in Nov. Act. Acad. Cces. v. 11. p. 215. 

 t. 33. f. 23. Funck, Deutschl. Moose, t. 15. n. 7. 



B. convoluta. Moug. et Nestl. n. 218. 



B, obtusifolia. Schwaegr. Suppl. v. 1. t. 31. Schultz, in Nov. Act. 



