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LÏCHEN graniformis.
Grained Lichen.
CRYPTOGAMIA Alga.
Gen. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
Spec. Char. Crust granulated, smooth, greyish white.
Tubercles scattered, roundish, black, polished,
wrinkled, irregular, without a border, mostly sessile.
Syn. Lichen graniformis. Hagen. Licit. 47. t. 1 . f . 2 .
Dicks. Crypt, fasc. 1 . 10 . With. v. 4. 7. Hull. 285.
Sibth. 319.
Calicium claviculare, /3 roscidum. jtch. Meth. 90.
T h i s minute Lichen seems to have been involved in needless
obscurity. Hagen’s synonym cannot be questioned, and we
can answer for those of Dickson and Acharius on the authority
of original specimens, but we have no positive means of
ascertaining the references of the excellent writer last mentioned.
Mr. D. Turner first observed this species on a wooden barn
of Mr. Crowe’s at Lakenham, where we have often examined
it since, and have found it always the same. The crust forms
broad patches on the flat boards, and is thin, loosely granulated,
of a greyish white, the particles rounded, smooth (not
mealy), running into lines, as Hagen well observes, from the
grain of the wood. The tubercles with us are sessile, scattered,
small, roundish, irregular, extremely wrinkled, very black,
but rather polished, without any kind of border. Some of
them in Dr. Acharius’s specimen, stand on thick flattish stalks,
like those of the Bceomyces tribe, but their surface never
becomes powdery. We conceive therefore this must be totally
distinct from his Calicium claviculare, see our next plate,
though he rightly observes it is what has. been taken by himself
for black warts in L. Ehrhartianus, see t. 1136, with which
it often grows intermixed.
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