204 DIPLOPERISTOM1. [Bryum. 



Webera nutaiis. Hedw. St. Cr. v. I. t. 4. Funck, DeutscU. Moose, 

 t. 25. / 7. 



Bryum compactum. Smith, EngL Sot. t. 1257. ? 



Bryum Wahlenbergii. Funck, Deutschl. Moose, t. 29. /. 7. (not of 

 Schwaegr.JDilL Muse. t. 50. / 61. 



HAB. Walls and heaths, principally in mountainous re- 

 gions. 



This species is remarkable, when the capsules are mature, 

 for the bright colour of its fruitstalks, and for the narrow and 

 glossy leaves, which, in the barren shoots, are almost linear, 

 and are always at the extremity of the stems the least broad. 

 The capsules are subject to vary somewhat in form ; but it is to 

 be observed that they are more pyriform as they advance in 

 age, and when in a dried state. 



17. B. elongatum ; stems short, leaves erect elongate-lanceolate 

 acuminated serrated nerve reaching to the point, capsule 

 elongato-clavate inclined rarely drooping. (TAB. XXX.) 



Bryum elongatum. Dicks. PL Crypt. Fasc. 2. p. 8. Turn. Muse. 

 Hib.p.lU. Smith, Fl. Brit. p. 1349. EngL Bot. t. 1603. Hook. 

 Fl. Scot. P. II. p. 151. Hobson, Brit. Mosses, v. 1. n. 102. Drum- 

 mond, Muse. Scot. v. I. n. 100. Arn. Disp. Muse. p. 47. 



Pohlia elongata. Hedw. St. Cr. v. 1. t. 36. Brid. Meth. p. 115. 

 Pohlia minor. Schwaegr. Suppl. t. 64. Brid. Meth. p. 115. 

 Pohlia acuminata. Funck, Deutschl. Moose, t. 26. / 3. 

 Webera alpina. Funck, Deutschl. Moose, t. 25. f. 9. 

 Bryum longicollum. (Webera, Hedw.) Swartz, Muse. Suec. t. 6. 

 / 13. 



Bryum cylindricum. Dicks. PL Crypt. Fasc. 4. t. 11. f. 4. Smith, 

 FL Brit. p. 1351. 



HAB- Mountains, especially in clefts of the rocks, and in 

 caves. 



We can perceive no difference between Mr. Dickson's B. 

 cylindricum and his elongatum ; and the B. longicollum of 

 Swartz, judging from the specimens we have received of it, is 

 only a large variety ; as Pohlia minor is a smaller state of the 

 plant. Of this latter we have authentic specimens, in which the 

 leaves are often as narrow as in the common appearance. 



B. elongatum is nearly allied to B. crudum, but that species 

 has much longer and more leafy stems, with an evanescent 

 nerve, and a shorter capsule. In both, the foliage possesses the 



