190 DIPLOPERISTOMI. [Hypnum. 



Hypnum compressum. Linn, Mant, v. 2. p. 310. Dill. Muse. t. 36. 

 f.22. 



y. tenue ; stems very slender ; leaves very slightly curved, narrow, lanceo- 

 late, quite entire. 



Hypnum polyanthos. Engl. Hot. t. 1664. (not Leskea polyanthos, 

 Hedw.) Turn. Muse. 1Kb. p. 137. 



HAB. On banks and trunks of trees, extremely common ; /3. 

 particularly abundant in shady woods ; y. mostly on trees. 

 So sportive is the present plant that it is scarcely possible to 

 define in a few words the marks belonging to any of the varieties. 

 The most striking, however, is our y. the H. polyanthos of 

 British authors, but not the Leskea polyanthos of Hedwig, 

 which is a true Leskea. At first sight its appearance is totally 

 unlike the more usual state of H. cupressiforme ; and we should, 

 perhaps, have hesitated about uniting them, had we not seen 

 the one, in some cases, running completely into the other. The 

 H. incurvatum of Schrader and Schwaegrichen likewise borders 

 upon this state of H. cupressiforme, but it differs in the shorter 

 and more cernuous capsule. The var. compressum is now 

 universally acknowledged to belong to our plant ; and we are 

 equally satisfied of Mr. Dickson's nigro-viride being no other. 

 66. H. Crista-castrensis ; stems closely pectinated, leaves falcato- 

 secund ovato-lanceolate acuminated serrulate striated faintly 

 two-nerved at the base, capsule oblongo-ovate curved cernu- 

 ous, lid conical. (TAB. XXVII.) 



Hypnum Crista-castrensis. Linn. Sp. PL p. 1591. Hedw. Sp. 

 Muse. t. 76. /. 14. Engl Sot. t. 2108. Moug. et Nestl n. 140. 

 Funck, Deutschl Moose, t. 72. / 72. Hook. Fl. Scot. P. II. p. 148. 

 Hobson, Brit. Mosses, v. 2. n. 73. JDrummond, Muse. Scot. v. 1. n. 95. 

 Schwaegr. Suppl v. 1. P. II. p. 293. Brid. Meth. p. 111. Am. 

 Disp. Muse. p. 69. 



HAB. Woods in Yorkshire. Mr. Backhouse. Kenmore 



Hill; above the Sheep Park at Taymouth; and in 



vast abundance near the summit of Schechallion. Mr. 



M'Intosh. Ben Voirlich ; Hill of Kinnoul near Perth ; 



and on Ben Lawers. Mr. Arnott. In a wood at the 



head of Hawes-water. Rev. James Dalton. Clova 



mountains, Scotland, plentiful. Mr. JDrummond. 



This most elegant species, so rare in general in this country, 



is one of the most abundant of mosses in the Fir Forests of 



7 



