Musct Exorici.—AHumboldtiani. 
POLYTRICHUM LONGISETUM. 
Polytrichum caule elongato subsimplici, foliis patentibus 
lanceolato-subulatis planis rigidis integerrimis, nervo 
latissimo, seta longissima, capsula ovato-tetragona, 
operculo rostro subseque longo. (Tas. LXVI.) 
Has. In monte Quindiu, regione temperata. (Andes de Cundi- 
namara.) Humboldt et Bonpland. 
Caulis 3-4-pollicaris, erectus, rigidus, simplex vel divisus. Folia 
arcte imbricata, patentia, (siccitate erecta,) rigida, nigro-fus- 
ca, lanceolato-subulata, margine plana, omnino integerrima, 
nervo stricto totam partem folii occupante. Seta palmaris et 
ultra, flexuosa, flavo-rubra, ob caulis innovationes sepe late- 
ralis. Capsula erecta, vel demum horizontaliter inclinata, 
Ovato-tetragona. Operculum longe rostratum, rostro capsule 
subzeque longo, curvato. 
In the present species the leaves are remarkable in having the 
nerve occupying the entire breadth of the leaf, in the margins of 
the leaves being not in the least involute, nor at all serrated. 
The leaves are likewise more patent than in any other individual 
of the genus with which I am acquainted ; the fruitstalks are 
longer in proportion to the size of the plant, as is also the oper- 
culum. 
Fig. 1, plants, nat, size. Fig, 2, leaf, Fig. 3, capsule and 
operculum,—magn, 
