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GYMNOSTOMUM JULACEUM.
Gymnostomum caule erecto filiformi subsimplicl, foliis
arete imbricatis appressis ovatis serrulatis convolutis,
nervo crasso, periehætialibus majoribus oblongis acuminatis,
seta longa, capsula oblonga ovata, operculo
subulato. (Tab. XLII.)
H a Js. In crepiilinibus montis ignivomi Rucu-Pichincha prope
Tablahiuna, regione frigida, super basaltam, altitudine 2340
hexapod. (Regni Quitensi.) Humboldt et Bonpland.
Caules cæspitosi, semiunciales, filiformes, rigidi,erectiusculi, simplices
vel-innovationibus ramosi. Folia arete flavo-viridia,
nitida, imbricata, undique cauli appressa, ovata, subconcava,
serrulata, nervo insigniter incrassato sub summum apicem
evanescente instructa. Perichoelialia his multo majora, fusca,
e xt. ovata, acuminata, subserrulata, nervo crasso, int. longiora,
circa setam convoluta, nervo inagis obscuro. Seta semiunci-
alis. Capsula oblongo-ovata, ore contracto, annuiate. Operculum
subulatum.
The stems and unmagnified leaves of this little plant resemble
those of Bryum julaceum more than any other moss; and its general
habit is that of a Pterogonium. It is however a true G y mnostomum,
as far as I am capable of judging without the calyptra,
which I have never yet seen, although it does not bear much
affinity to any of the other species of this varying genus. The
nearest is perhaps G. oestivum; in which, as well as in this plant,
the perichætium is highly worthy of remark; but in their leaves
the two species are totally different from one another.
Fig. 1, plants nat. size. Fig. 2, plants magn. Fig. 3, leaf.
Fig. 4, 5, perichætial leaves. Fig. 6, capsule. Fig. 7, operculum.
Fig, 8, mouth of the capsule, showing the snnulus.-™
magn.
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