How widely this nearly new moss is distributed in Scotland,
may be perceived by the annexed stations, all of which
have been ascertained in the course of a few months. That
communicated by Mr D r u m m o n d arrived just in time to be
recorded; and it is with infinite pleasure that I assure the native
botanist, he will recognise in that individual a worthy successor
to the late industrious G e o r g e D o n . In Muscology
alone, he has been eminently successful, having added to our
British Flora Neckera pennata, Didymodon glaucescens,
and Tzmmta megapoUtana Q) ■, besides discovering a second
station for that very rare moss Gymnostomum Doniamm.
(Jrthotrichum rupincola approaches most nearly to O affine,
but differs from it in the following characters ; - th e leares
are more rigid and erect, of a much blacker colour ; the teeth
ot the peristome are not approximated in pairs, and scarcely
with the b e ^ suddenly set on, and of a reddish-brown colour-
whereas in O ajine it tapers gradually into the beak, and is
of a yellowish-white colour,” (H o o k , in litt.) The theca
though striate near the mouth, is destitute of those decided
turrows so conspicuous in that of O. affine. Tbe calyptra of
our moss is also remarkable for its deeper colour, and widely
campanulate form. In general habit and colour, O. rupincola
somewhat resembles O. Hutchinsia; and O. anonalum, but
IS generally larger and more robust than either.
/ • / f f“ - ^ plani. Fig. 3. A leaf. Fig. 4.
The not removed from the theca. Fig. 5. View o f the Peristome. Fig. 6.
PorUon o f the per^stOMe. ^ Fig. 7. Calyptra. Fig. 8. Sp o ru le s.-A ll but:
■Tig. 1 . more or less magnified.