[ 9 °6 1
LICHEN ventofus.
Re d-f/.angled Tartareous Lichen,
j 3 y
CRYPT OG AM I A Alga.
G en. Char. Male, fcattered warts.
Female, fmooth fhields or tubercles, in which the
feeds are imbedded.
S p ec . C har. Cruft rugged, formed of tumid warts,
of a pale fulphur-colour. Shields irregular, a little
fwelling, blood-red, with a narrow pale border.
S yn. Lichen ventofus. Linn. Sp. Pi. 1607. Achar.
Prod. 46. Budf. 5,27. With. v. 4. 16. Hull. 288-
Lightf. 806. Dick/. H. Sicc.fafc. 5. 2,3.
L . cruentus. Web. Goett, 184- i»-,;
L. gelidus. Hudf. 528.
Lichenoides tartareum lividum,fcutellis rufis,margine
exili, DHL Mufc. 13 3 . t. 18. ƒ. 14.
E have received this elegant Lichen from Durham by
favour of the Rev. Mr. Harriman, and have ourfelves gathered
it in great perfection on Ben Lomond ; on Cafterton Fell, near
iyirkby Lonfdale, Weftmoreland ; and in fome other places.
It grows on large expofed Hones of the granite kind.
The cruft fpreads in patches 6 or 8 inches broad, and may
in moift weather be pared off entire from the rock. It is
moderately thick, apparently a congeries of crowded fwelling
fmooth (not mealy) warts, of a pale yellowilh green or fulphur-
colour, which however changes to a tolerably pure white in
the courfe of one winter’s growth, for the plant appears to laft
feveral years. The fhields are numerous, fcattered, of a
beautiful crimfon or blood-red, irregular in fize and fhape, a
little tumid, and encompaffed by a margin of the colour of the
cruft, becoming narrower and ftained with red by age. Little
black rugged warts are alfo fcattered over the furface of the
cruft, or in its cracks; we can only guefs them to be the male
part of the fructification. The old fhields turn black in depay,
and often bear young ones.
That this when white is the L. gelidus of Mr. Hudfon, I
ventured many years ago to prefume from his defcription, and
the fynonym (though wrong tranfcribed in the PI. Angl.) of
Dillenius, For the true gelidus fee our v. 19. t. 699,
JuZg 1- rSdr. djAZt/fceA dag ifa w e rfy , J/andevz/.