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GYROPHORA murina.
Mouse-skin Gyrophora.
CRYPTOGAMIA Alga;.
Gen. Char. Tubercles sessile, on a peltate frond, black,
with a plaited contorted disk, in whose clefts the
seeds are lodged.
Spec. Char. Frond membranous; its margin plaited,
wavy and somewhat lobed ; minutely granulated
on both sides; glaucous grey above; blackish
brown beneath. Tubercles scattered, somewhat
bordered, much convoluted.
Syn. Gyrophora murina. Ach. Meth. 110.
Lichen murinus. Ach. Prod. 143.
L. griseus. Ach. in Act. Holm. ann. 1794. 9 I. t. 2.
f. 3.
L. pulmonarius saxatilis, cinereo-fuscus, minimus.
Vaill. Paris. 116. t. 2 1 ./ . 14. Sm. Tdur, ed. 2.
v. 1. 108.
COMMUNICATED by Mr. Turner, but the specimens are
exotic. We know not the precise place of growth of this species
in Britain, though we have it from Sweden, Switzerland and
France. It may be what Dare found on St. Vincent’s rocks, and
if so, it is L . Dillenii, IVith. v. 4. 63 ; which we are the more
inclined to believe, as Mr. Turner, in Tr. of L. Soc. v. 7. 112,
asserts it to be t. 30. f . 117, of Dillenius. We indeed, on consulting
the herbarium at Oxford, found his/. 117, to be polyr-
rhizos of the Linnsean herbarium, Gyrophora hirsuta of Acharius,
and the true Lichen spadochrous of Ehrhart; nor can we account
for the assertion of our learned friend, but by supposing, as Dillenius
certainly confounded the two, they may both be placed
together in his collection.
G. murina is a very distinct species, from one to two inches
broad; black, without fibres, beneath, finely granulated with
pale cartilaginous warts, like shagreen ; browner towards the
edge. The upper side is grey, very minutely cracked, without
veins or plaits ; white and mealy in the middle. Tubercles rare,
minute, seldom perfectly plaited, though Acharius did ascertain
them to be so. We have some from Switzerland, in the state
which led him to refer the plant to Endocarpon.