OPEGRAPHA notha.
Spurious Opegrapha.
CRYPTOGAMIA Algae.
Gen. Char. Seeds in black, linear, sessile, simple or
branched, bordered clefts, in an uninterrupted crust.
Spec. Char. Crust thin, powdery, white, dispersed.
Clefts prominent, mostly simple, rounded, wavy,
dilated, of various dimensions.
Syn. Opegrapha notha. Acli. Meth. 17-
O. lichenoides. Persoon in Ust. Ann. fuse. 7* SO. t. 2.
f 4 ., a, b-
Lichen nothus. Ach. Prod. 19.
Graphis curvula. Ehrh. Crypt. 253.
P e r s o o n and Ehrhart seem to have observed this species
independent of each other. The specific name given by the
former, and that of Acharius, allude to the same characteristic
mark, the breadth and dilatation of the fructification, which
in an advanced state almost resembles the shields of a Lichen,
being so broad in its middle part as to be almost ovate. Sometimes
the young clefts, being very short, have a similar figure.
Professor Acharius mentions several varieties, which we have
from himself, but which appear rather different stages of
growth. The crust is thin, leprous or powdery, generally
very white, sometimes more dispersed, and by age becoming
yellowish or dusky.
Mr. Turner sent our specimens from old trunks of trees
near Yarmouth.
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