Musci Exorict.—Swainsoniant. 
ORTHOTRICHUM RUGIFOLIUM. 
Orthotrichum caule repente, ramis erectis, foliis ellipticis 
substriatis rugosis nervo breviter excurrente, seta lon- 
giuscula, capsula oyato-oblonga levi, calyptra cam- 
panulata nuda glabra basi 4-dentata. (Tas. 
CXXVIII.) 
Has. Prope Rio Janeiro Americe meridionalis. D, Swainson. 
Caules repentes, valde ramosi, ramis erectis. Folia dense im- 
bricata, erecto-patentia, fuscescentia, superiora viridia, ellip- 
tica, substriata, apice insigniter plicato-rugosa, nervo vali- 
diusculo paulo ultra apicem excurrente instructa. Periche- 
tialia minus rugosa, sed acuta, Sefasemiunciam longa. Cap- 
sula ovato-oblonga. Calyptra campanulata, nuda, glabra, 
castanea, basi in dentibus 4, brevibus, membranaceis fissa. 
Operculum e basi hemispherica’ acuminatum. Columella 
atque Peristomium omnino ut in O. Swainsoni (Tas. 
CXXVII.) 
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Here again is an Orthotrichum, which at first sight is scarcely 
distinguishable from O, Swainsoni ; yet, besides the remarkable 
rugosity of the leaves, the calyptra is of a totally different struc- 
ture, 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. 1, 1, 1, plants, nat, size. Fig. 2, portion of a stem and 
fructification. Fig. 3, leaf. Fig. 4, apex of ditto. Fig. 5, pe- 
tichetial leaf. Fig. 6, capsule. Fig. 7, peristome and columella. 
Fig. 8, calyptra. Fig. 9, teeth of peristome.——magn, 
