Genus Polytrichum ; with fome Emendations. 83 



18. Polytrichum alpinum t fol. lineari-lanceolatis denticulato- 

 ferratis rigidis, capfulis ovatis fubnutantibus. 



P. alpinum Linn. Sp. PL 1573. Dill. Mufc. 427. tab. 55. / 4. 

 Hab. in ericetis monto/is, in boreali parte Europe?. 



Thejlal&of this is from two to three inches in height, and di- 

 vides into numerous branches. — The leaves are ftrong, ftifF, linear- 

 lanceolate, and finely ferrated on the edges with iliarp minute 

 dents : they are generally of a dark brown on the lower parts of the 

 plant, but light green on the upper branches, where they alfo be- 

 come brown in a dried ftate. — The peduncles are numerous, from an 

 inch to an inch and half long, of a deep draw-colour, and iflue 

 from the fummits of the branches out of clofe cylindrical tubes, 

 which are about two tenths of an inch in length. — The capfule is 

 ovate, tumid, and a little inclined or nodding. The operculum is 

 conical and pointed .—The exterior calyptra isfmall, fubulate, of a 

 ferruginous colour, and about a third longer than the inner one. 



19. Polytrichum Jylvaticum, fol. lineari-lanceolatis acuminatis 



ferratis rigidis, capfulis oblongis cernuis fubincurvis. Tab. 7. 

 Fig. 6. 

 Hab. infyhis abietinis ora accident alis America feptentrionalts. 



This grows from two to four inches and fometimes even to fix 

 inches in height, and is loofely divided into four or five branches ; the 

 lower part of the ftalk is ftifF and naked, but the upper part and 

 branches are crowded with long narrow fpreading leaves— The 

 leaves are linear-lanceolate, ending with fetaceous points, and finely 

 ferrated on the edges, which in a dried ftate turn in fo as to appear 

 channelled; the lower leaves are of a reddifti brown colour, but 

 the upper ones are of a dark green.— The peduncles are from an 



M 1 inch 



