The English flora - SeaweedAfrica

182 LICHENES. [Lecidea.
Common in Sussex, on decaying rails, but rarely producing apothecia,
Mr. Borrer.— " In the structure of the thallus, this Lichen differs but
little from L. scabrosa, E. Bot. t. 1878, which, when growing on a compact
substance, is found to begin in the same manner, with a film and
minute granulations ; but the powder which soon covers the surface is,
in that species, of a paler and more yellow hue and the structure of its
jwtellulce is different. L. ceruginosa is perhaps more nearly allied to
L. quadricolor, E. Bot. t. 1158. Indeed it must be admitted that these
two recede more in general appearance than in any essential character,
yet it would be scarcely justifiable to regard them as one species. In
L. ceruginosa the granulations of the thallus are smaller, more crowded
and confluent, and of a greener hue, and the powder they produce
is much more copious and of a dark verdigris-green, whilst that in L.
quadricolor is not much darker than the granules. The apothecia also are
smaller in L.ccruginosa, their margin, perhaps, more elevated and their
colour not altogether so variable. From another nearly allied species,
L. Lightfootii, E. Bot. t. 1451, the present differs in most of these and in
some additional particulars." Borr. From the variable colour of the
apothecia of this species, it will be seen that it has an equal claim to rank
with the former as the present section of the Genus, a section eminently
artificial.
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45. L quadricolor, Borr. Mss. (four-coloured Lecidea); crust
leprous-grey with white granulations, young apothecia gelatinous
flesh-coloured with a pale border old ones blackish. Sm.—
Lichen quadricolor, Dicks. Cr. Fasc. 3. p. 15. t.
9.f.
3. E. Bot.
t. 1185. Lecidea decolorans, Florke.—Ack. Syn.p. 37, and /3.
granulosa, of the same.—L. escharoides, L. desertorum and L.
artyta, Ach. Lich. Univ. (Borrer).
On the ground, in heathy and sandy places, in perfection during the
moist winter-months.
46. L. corondta, Borr. Mss. (crenate-shielded Lecidea?); crust
of minute granulations scarcely lobed and imbricated, warts or
scales olive-brown, apothecia crowded flattish red-brown their
border elevated narrow crenate. Sm.— Verrucaria and Psora
coronata, Hoffm.—Lichen granulosus and L. pezizoides, Dicks.
—Lichen brunneus, E. Bot. t. 1246. Lecanora brunnea, (3. coronata,
Ach. Syn. p. 192. (3. escharoides; crust brownish ashcoloured
composed of granulated warts, apothecia convex irregular
black with an obsolete black border. Lichen escharoides,
E. Bot. t. 1247, (not Ach.).
On the earth, among turf or decayed mosses.— £. on turfy ground or
on rocks, Cornwall, and at Yarmouth, Mr. Turner.— Mr. Borrer con-
siders the Lichen escharoides of E. Bot. to belong to this species ; I
have therefore made it the var. /3.
47. L. anomala, Ach. (tumid brown-shielded Lecidea); crust
very thin continued smoothish glaucous-white, apothecia scattered
small sessile brown with a light border of their own substance
at length hemispherical blackish the border disappearing.
Sm Ach. Syn.p. 38 Lichen cyrtellus, E. Bot. t. 2155.
/S. effusa ; crust thin powdery light-green, apothecia pale waxybrown
with a paler border at length convex without any bor-
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