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ÖP EGRAPHA cerasL
Cherry-tree Opegrapha.
CRYPTOGAMIA Algce.
Gén. Char. Seeds in blacky linear, sessile, simple of
branched,bordered clefts,in an uninterru pted crust.
Spec. Char. Crust limited, shining, white. Clefts
immersed, linear, somewhatwavy, parallel, acute,
simple or branched.
Syn. O p eg rap h a cerasi. Ach. Meth. 27, Persoon in
Ust. Ann. fase. 1L 20.
Lichen cerasi. Ach. Prodr. 26,
JVXr . W . BORRER has lately discovered this pretty and
distinct species, on the barks of old cherry or plum trees.
The crust is cream-coloured, extended horizontally in narrow
Oblong patches partly round the tree, continued, distinctly
limited, thin, rather rugged or scaly, but otherwise smooth
and polished. Clefts also lying parallel to each other in the
same horizontal direction, of a somewhat greyish black, straight
or slightly wavy, acute at each end, sunk in the crust, sometimes
coalescing or running into each other, so as to become
branched. Their disk is very narrow and black ; edges becoming
elevated by age. The fructification is extremely well
described both by Persoon and Acharius.