OPEGRAPPIA elegansi
Elegant Grooved Opegrapluu
CRYPTOGAMIA Algce.
Gen. Char. Seeds in black, linear, sessile, simple of
branched, bordered clefts, in an uninterrupted crust.
Spec. Char; Crust orbicular, granulated, white, somewhat
shining. Clefts immersed, scattered, divaricated,
mostly simple, with a grooved border*
DISCOVERED by Mr. W. Borrer in Sussex, on the smooth
bark of young trees.
The crust is several inches broad, circular and uninterrupted,
white and somewhat polished, not at all mealy, but finely
granulated all over with little regular protuberances. Clefts
scattered, divaricated in every direction, shortish, straight,
mostly simple, though not invariably so. They project but
little above the crust, accompanied by a slight accessory
border, which sometimes, as in other species, turns back.
Their proper border is peculiar, being marked with a deep
uninterrupted longitudinal furrow on both sides of the disk,
which latter is very narrow.
This species cannot be referred to any in the works of
Acharius, rich and ample as they are, and we have given it a
name chosen by Mr, Borrer, which it well deserves.
1812
Moy.jjSoj. HibUslM by Ja.* Sctrerby, London/,