L I C H E N Harrimanni.
Microscopic Dot Lichen.
CRYPTOGAMIA Algae.
Gen. Char. Male, scattered warts.
Female, smooth shields or tubercles, in which the
seeds are imbedded.
Spec. Char. Crust tartareous, contiguous, limited,
mouse-coloured, with very minute depressed dots.
Tubercles minute, immersed, globose, with a prominent
bordered orifice ; dirty white within.
Syn. Verrucaria Harrimanni. Ach. Lichenogr. Univ.
v. 1. 284.
W e have long ago wished to dedicate to our liberal friend,
the Rev. Mr. Harriman, some one of the numerous Lichens of
which he was the first discoverer, but could never obtain his consent,
which probably his correspondent Dr. Acharius did not think
of soliciting. We are glad that so worthy a name has become
thus properly commemorated.
Mr. Harriman found the present species of Lichen, or, according
to the Acharian system, Verrucaria, on hard grey calcareous
rocks in the county of Durham. Its patches, though inseparable
from the stone, are very distinctly limited, and visibly prominent
above its surface, of a hard tartareous texture, white within,
greyish or pale mouse-coloured on the outside, which is thickly
besprinkled with innumerable minute depressions or dots. The
tubercles are truly those of a Verrucaria, deeply sunk in the
crust, blackish, their little bordered orifices only projecting slightly
above its level.