[ 2149 ]
LEP Pi A RIA v i resee n s.
Dull-green Lepraria.
CRYPTOGAMIA Algae.
Get?. Char. Seeds in a powdery substance, loosely
clothing a membranous or fibrous crust.
Spec. Char. Crustaceous, granulated, continued, somewhat
gelatinotis; greyish dull greefi when dry •,
bright green when wet.
F o u n d on the trunks of trees, especially elms, in Sussex,
by Mr. W. Borrer, who esteems it a nondescript Lepraria.
Certainly as no shields have been discovered', we are not warranted
to place it elsewhere ; nor do we know any thing 6f
the Lichen kind, except perhaps some of the Collemata,
whose crust imbibes moisture so copiously and instantaneously,
or becomes so gelatinous, as this.
The crust is perfectly uninterrupted, though not distinctly
bordered, at first thin, then considerably thickened, of a dull
greenish grey or dark lead-colour when dry, but, when
moistened, changing to a deep rich green, in which state the
granulations that cover the surface become more tumid and
conspicuous. They adhere to a thick uniform base, and are
not concatenated like the granules of L. lotryoides, t. 2148,
neither do we discern any thing like powdery seeds. We cannot
help suspecting that some future discovery of shields may
prove this a gelatinous Lichen, or Collema ; for we know no
other Lepraria whose colour varies, in the least degree, with
moisture.
my.
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