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Genus Polytrichums with fome Emendations. x 83 
18, Potyrricuum alpinum, ; fol. lineari-lanceolatis denticulato~ 
ferratis rigidis, capfulis ovatis fubnutantibus. 
»P. alpinum Linn. Sp. Pl.15§73. - Dill. Mufe. 427. tab. 55. fo 4. 
Hab. in ericetis montofis, in boreali parte Europa. 
The falk of thisis from two to three inches in height, and di-: 
vides into numerous branches.—The /eaves are ftrong, {tiff, linear- 
lanceolate, and_ finely, ferrated on the edges with fharp 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 ftraw-colour, and iffue 
from the fummits of the branehes out of clofe cylindrical tubes, 
which are about two tenths of ai inch im length.—The cap/ule is 
ovate, tumid, and a little inclined or nodding. The operculum is 
conical and pointed.—The exterior calypira is {mall, fubulate, of a 
ferruginous colour, and about a third longer than the inner one, 
19. Potyrricuum /ylvaticum, fol. lineari-lanceolatis, acuminatis 
ferratis rigidis, capfulis oblongis cernuis fubincuryis.. Tas. 7. 
Fic, 6. 
Hab. in Silvis abictinis oree occidentalis America fe fe >ptentrionalis. 
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 /a/k is {tiff and naked, but the upper part and 
branches are crowded with long narrow fpreading leaves.—The 
deaves 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 reddifh brown colour, but 
the upper ones are of a dark green.—The _ peduncles are from an 
M 2 inch 
