I f! [ 1911 ]
OP EGR A PHA microscopica.
Microscopic Opegrapha,
CRYPTOGAMIA Algae.
Gen. Char. Seeds in black, linear, sessile, simple or
branched, bordered clefts, in an uninterrupted crust.
Spec. Char. Crust determined, very thin, smooth,
shining, pale copper-coloured. Clefts scattered,
immersed, somewhat parallel, mostly simple, oblong,
with a very narrow black edge.
Syn. Graphis microscopica. Ehrh. Crypt. 273.
F o u n d by Mr. W. Borrer on the smooth bark of young
oaks in Sussex, along with Lichen analeptus, t. 1848. In
the original specimen of Ehrhart, now before us, these two
species are confounded; but as the present only belongs to
Opegrapha, his Graphis, we must do him the justice to presume
it is what he intended. We find-no mention of it in
any other publication.
The thin, smooth, pale brown, somewhat copper-coloured
crust forms limited patches of various sizes, very much like
those of the Lichen above mentioned. The fructification differs
essentially, consisting in the present instance of the true
oblong clefts of an Opegrapha, generally simple, ranged in a
parallel manner, very small, and furnished with an extremely
narrow black edge.