The English flora - SeaweedAfrica

Opegrapha.] LICHENES, 147
On the smooth bark of trees, Sussex, Mr. Borrer.—The proper border
of the lirelLc of this species is very remarkable, having a deep longitudinal
furrow, or being, as it were, itself a double border.
13. O. scripta, Ach. (black-letter Opegrapha); crust thin
membranous more or less smooth somewhat shining greyishwhite
indistinctly bordered with black, apothecia partly immersed
naked or pruinose flexuose simple or branched in a parallel direction
subriraiform surrounded by an accessory raised border
formed of the crust. Ach. Lick. Univ. p. 265. Schcer. Licit.
Helv. p. 46. n. 87—92. (not E. Bot. according to Mr. Borrer,
but) O. pulverulenta, E. Bot. t. 1754, O. Cerasi, t. 2301, and O.
serpentina, t. 175.5.— Graphis seripta, Ach. Syn. p. 81.— G. serpentina,
Ach. Syn. p. 83.
On the smooth bark of trees.— So sportive is this species that it is
scarcely possible to define its limits : the crust is more or less smooth
and shining, the lirellcc more or less branched, and the disk naked or
pruinose. In the type of this species, the a. of Acharius, the Urelbc are
naked and shining ; in his £., the O. pulverulenta, Pers. and E. Bot., thc\
are pulverulent, in the y., 0. cerasi E. Bot,, the Urelkc are small and
parallel with each other, mostly simple ; and in the O. serpentina of E.
Bot. the crust is tartareous and uneven, the lirellcc somewhat powdery,
— and all intermediate states of these may be met with : in short, it would
appear that almost all the European true Graphides may be referred to
one and the same species.
*** Apothecia with a raised accessory border formed of the crust,
the proper border obsolete. Platyguammk. Meyer.
14. O. Lyellii, Sm. (ivhite-bordcred Opegrapha); crust smooth
membranous pale olive, apothecia prominent turgid crowded
curved obtuse greyish and powdery destitute of proper bonier
with an elevated white powdery accessory border formed of the
crust. E. Bot, I. L876, and O. seripta. E. Hot. t. L813, (ac-
cording tO Mr. Borrer, but surely very unlike the plant.)
marginata, Dubis, Bot. Gall, c 2. p. ()4: }
>.— Graphis Lyellu, Ach.
Syn. p.