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ORTHOTRICHUM RUGIFOLIUM.
Orthotrichum caule repente, ramis erectis, foliis ellipticis
substriatis rugosis nervo breviter excurrente, seta longiuscula,
capsula ovato-oblonga lævi, calyptra campanulata
nuda glabra basi 4-dentata. (Tab.
CXXVIII.)
Hab. Prope Rio Janeiro Americæ meridionalis. D. Swainson.
Caules repentes, valde ramosi, ramis erectis. Folia dense imbricata,
erecto-patentia, fuscescentia, superiora viridia, elliplica,
substriata, apice insigniter plicato-rugosa, nervo vali-
diusculo paulo ultra apicem excurrente instructa. Perichcetialia
minus rugosa, sed acuta. Seta semiunciam longa. Capsula
ovato-oblonga. Calyptra campanulata, nuda, glabra,
castanea, basi in dentibus 4, brevibus, membranaceis fissa.
Operculum e basi hemisphærica acuminatum. Columella
atque Peristomium omnino ut in 0 . Swainsoni (Tab.
CXXVH.)
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Here again is an Orthotrichum, which at first sight is scarcely
distinguishable from 0 . Swairisoni; yet, besides the remarkable
rugosity of the leaves, the calyptra is of a totally different structure,
very much resembling that of Encalypta ciliata. In this
respect also it precisely accords with Sclotheimia squarrosa, but
differs from it in its much smaller size, in the rugosity of the
leaves towards their apex, and in the peristome, if that figured
by Schwaegrichen be correct.
Fig- E E E plants, nat. size. Fig, 2, portion of a stem and
fructification. Fig. 3, leaf. Fig. 4, apex of ditto. Fig. 5, perichaetial
leaf. Fig. 6, capsule. Fig. 7, peristome and columella.
Fig. 8, calyptra. Fig. 9, teeth of peristome.—
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