The English flora - SeaweedAfrica

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Spihma.} LICHENES. W
10. S. gregdrium, Turn, and Borr. (jed clustered Spiloma);
crust filmy thin greyish, apothecia clustered shapeless solid of
a livid hue, sporules vermillion-coloured superficial. Turn, and
Borr. Lick. Br. p. 42, x. cinnabarinum ; apothecia somewhat
convex covered with a profusion of vermillion-coloured sporules.
Coniocarpum cinnabarinum, De Cand.— Splieria gregana,
« Weigel. 43. t. 2./. 1 0." Dicks. Cr. Fasc. t. 22. Sower, Br. Fung.
t. 375./. 5 Spiloma tumidulum, Ach. Sgn. p. 1. E. But.
t. 2151.—Lichen impolitic, E.Bot.t.9S].—[3. rosaceum ; apo-
thecia collected into flat clusters which have the appearance of
y. margi-
being lobed, sporules copious vermillion-coloured.
natum ; apothecia somewhat convex party-coloured, sporules
few chiefly confined to the margin. b. coucolor ; apothecia convex
of nearly the same colour as the crust, sporules scarcely
any.— e. dubium ; apothecia rather convex lurid pruinose, sporules
none.—£. detritum ; apothecia depressed lurid nearly
naked, sporules none.
depressed covered with a whitish pruina, sporules none.
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n. nv'crostigma; apothecia minute solitary
a. and y. are common on bark, chiefly on smooth trees.—/J. on old
Oak on Poynings Common, Sussex— S. and *. grow on Oak and
Ash.— ?, chiefly on Hazel— n. on Ash in shady places — " The large
size of the compact base or internal disk of the pulvinuli, sufficiently distinguishes
the present plant, through all its variations, from its congeners;
as in every other Spiloma, hitherto detected, S. punctalum alone
excepted, this part, if present at all, is very minute and entirely concealed
by the sporules." The two last varieties t. and I bear a close
resemblance to Artbonia impo/ita ; but the thallus of the Arthonia is
stated to be always thicker and more uneven, and its apothecia, though
larger, are generally less conspicuous than those of the Spiloma, being
scarcely, if at all, elevated above the level of the thallus: their internal
substance likewise is very different, presenting a more waxy appearance
when cut.
11. S.? tuberculatum, 8m. (warty Spiloma); crust calcareous
greyish-white, apothecia scattered somewhat confluent unequal
elevated granulated black. E. Bof. /. 2556. Schorr. Licit.
.').
Helv. 1 1. 2. a.
On sandstone rocks, in the neighbourhood of Newcastle.—Mr. Homer
consider* the thallus to be probably that of some Lecidea.
Obs.—The Spiloma meUmopum o( Sm. in E. Bot. t. 2358, described
i|s having "the crust verj thin greyish, apothecia Bat dilated irregular
somewhat confluent black," and communicated by Mr. Borrer to Sir Jas.
I Smith, is now considered to be a doubtful production, being mixed
with comparatively large jointed filaments, probably belonging to some
Confi rva or filamentous Fungus. The Spiloma wulanopum of Ach. M