2667
STEREOCAULON Cereolus.
Simple-stalked Stereocaulon.
CRYPTOGAMIA Lichenes.
Gen. Char. Discoid tubercles terminal or lateral, on
firm, solid, simple or branched stalks, from which
they are furnished with an evanescent spurious
margin.
Spec. Char. Stalks simple, erect, without powdery
warts, rising from an uneven, granulated crust.
Svn. Stereocaulon Cereolus. Ach. Meth. 316. t. 7.
f 1. Lich. Univ. 582.
S. cereolinuro. Ach. Sj/n. 285.
Lichen Cereolus. Ach. Prod. 89.
A T .THOUGH hitherto unpublished as such, this Lichen
has long been known to us as a native of Britain. The
smaller specimen figured, which shows the most regular
state of the species, was kindly communicated by the Rev.
T. Salwey of Oswestry, by whom, in company with the late
T. A. Knight, junior, Esq., it was found on Cader Idris.
The larger specimen was sent from Egleston, Yorkshire,
in 1799, by the Rev. John Harriman, who sent similar specimens
to Acharius, as mentioned in the Lichenographia
Universalis. Mr. Cotton has gathered the species on Ben
Lomond.
An uneven, loosely connected crust, composed of minute,
grey or slightly caesious, unpolished, tartareous, convex,
irregularly lobed and rugged granules, spreads widely over
the stone, intermixed with much larger, roundish, black or
sooty-brown warts, (clusters, perhaps, of abortive fructification,)
of a somewhat wax-like substance within, and with
a convex minutely granulated surface. The perfect stalks
are numerous, erect, rarely a quarter of an inch high, nearly
cylindrical, sometimes thicker upwards, simple, or a little
divided at the summit, usually much encrusted with granules