DIPLOPERISTOMI. 189 



leaves. Schwaegrichen has represented his magnified leaves as 

 two-nerved at the hase, which we never could find to be the 

 case in our specimens. It appears to be a species but little 

 understood on the Continent, 



64. H. silesianum; leaves loosely imbricated secund narrow 

 lanceolate acuminated serrated nerveless or very obscurely 

 two-nerved, capsule subcylindrical erecto-cernuous, lid conical 

 obtuse. (TAB. XXVII.) 



Hypnum silesianum. Pal. de JBeauv. Prodr. p. 70. Web, et Mohr, 

 Fl Cr. Germ. p. 343. Smith, Engl Bot. t. 2016. Schwaegr. Suppl 

 v. 1. P. II. p. 287. t. 94. Moug. et Nestl. n. 425. Funck, Deutschl 

 Moose, t. 49. /. 68. Hook. FL Scot. P. II. p. 148. Arn. Disp. 

 Muse. p. 68. Brid. Meth. p. 169. 



HAB. Summit of Ben Luyal, in Sutherland. Alps of Scot- 

 land, not uncommon. 



This plant is scarcely to be known from some of the small 

 varieties of H. cupressiforme but by its less falcate, more ser- 

 rated, naiTOwer leaves, and shorter lid. Indeed, the serratures 

 reach down nearly the whole length of the margins, but then 

 we have observed them to be more or less apparent in different 

 specimens. Schwaegrichen says that the fruitstalks arise from 

 near the base of the stem, a circumstance which, though general, 

 is not constant. In the alpine parts of Switzerland it is ex- 

 tremely common, retaining all the characters we have given it. 



65. H. cupressiforme ; leaves closely imbricated more or less fal- 



cato-secund lanceolate acuminated entire except at the points 

 which are usually serrated very faintly two-nerved at the 

 base, capsule cylindrical erecto-cernuous, lid conical with a 

 point. (TAB. XXVII.) 

 K. vulgare ; steins broad, semicylindrical ; leaves falcato-secund. 



Hypnum cupressiforme. Linn. Sp. PI. p. 1592. Hedw. St. Cr. v. 

 4. t. 23. Turn. Muse. Hib. p. 193. Smith, Fl. Brit. p. 1331. Engl 

 Bot. t. 1860. Moug. et Nestl. n. 229. Funck, Deutschl Moose, t. 49. 

 / 69. Schwaegr. Suppl v. 1. P. II. p. 290. Brid. Meth. p. 178. 

 Hook. Fl Scot. P. II. p. 148. Hobson, Brit. Mosses, v. 1. n. 95. 

 Drummond, Muse. Scot. v. 2. n. 86. Arn. Disp. Muse. p. 68. 



Hypnum nigro-viride. Dicks Turn. Smith Dill Muse. t. 37. f. 

 23, andt. 4 1./. 53. 

 0. compressum ; stems slender, compressed ; leaves falcato-secund. 



