14. B. scopulicola A. L. Sm.—Thallus effuse, granular-
verrucose, unequal, greyish- or brownish-green. Apothecia small,
a t ffrst plane and obtusely margined, then convex and immarginate,
brownish-flesh-coloured ; paraphyses slender ; epithecium
colourless ; hypothecium colourless (the subhymenial layer tawny-
brownish) ; spores acicular, thinly or obsoletely 3-5-septate,
0,032-44 mm. long, 0,002 mm. thick ; hymenial gelatine bluish
then tawny-wine-red with iodine.—Lecidea scopulicola Nyl. in
Flora Ivii. p. 312 (1874) ; Cromb. in Grevillea iii. p. 23 ; Leight.
Lich. FI. ed. 3, p. 368.
Distinguished from the preceding species by the more developed
thallus and longer spores.
Hah. On maritiine rooks in S. England.—B. M. Eosemodris Cliff,
Penzance, Cornwall (the only locality).
15. B. inundata Koerb. Syst. Lich. Germ. p. 187 (1855).—
Thallus effuse, granulose or rimose-areolate, greenish (K —,
CaCl — ). Apothecia m inute, subinnate-sessile, a t first concave and
thinly margined, a t length convex and immarginate, pale-brown,
leaden-coloured, dark-red or blackish; paraphyses coherent, colourless
a t the apices ; hypothecium pale ; spores straight or curved,
elongate, attenuate a t the apices, 3-7-septate, 0,034-40 mm.
long, 0,0015-25 mm. th ick ; hymenial gelatine bluish then wine-
red or violet with iodine.—B. luteola var. y inundata Mudd Man.
p. 183 (1861). Biatora inundata Fr. in Vet. Acad. Handl.
1822, p. 270. Lecidea inundata Nyl. in Flora Iviii. p. 106
(1875) ; Cromb. in Grevillea xxii. p. 58. L. arceutina Nyl.
f. inundata Cromb. Lich. Brit. p. 73 (1870). L. effusa var.
immdata Leight. Lich. FI. p. 344 (1871); ed. 3, p. 371.
Exsicc. Mudd n. 149.
_ The thallus, occasionally little developed, varies somewhat in
thickness, and when dry is often tawny-greenish. I t is usually well
fertile; the apothecia are very variable in colour in different
specimens; the spores are often curved to an S-shape. The spermogones
are frequent with curved spermatia, 0,0025-30 mm. lonu,
0,0006 mm. thick.
Hah. On rocks and boulders, at times inundated, in maritime and
upland tracts, occasionally on moist wood.—DZsir. Seen only from a
few localities in Great Britain and Ireland ; no doubt often overlooked.—
B. M. Malpas, near Truro, and Mt. Edgecuinbe, Cornwall;
Fishguard Harbour, Pembrokeshire; near Ayton and Airyholme
Wood, Cleveland, Yorkshire ; Teesdale, Durham; near Ballachulish,
Argyll; Glen Lochay, Killin, Perthshire; Glen Callater, Braemar.
Aberdeenshire ; Lettermore, Connemara, Galway.
Subsp. allecta. A. L. Sm.—Apothecia white-flesh-coloured;
spores acicular, thin, 0,056—70 mm. long, 0,001 mm. th ick ;
otherwise as in the type.—Lecidea inundata subsp. allecta Nyl
in Flora Ix. p. 567 (1877); Cromb. in Journ. Bot. xx. p. 275
(1882) & in Grevillea xxii. p. 58. Specimen not seen.
Characterized by the colour of the apothecia and the thinner
longer acicular spores. Spermatia as in the species.
Hdb. On siliceous rooks in a maritime district.—Distr. Extremely
local and scarce in W. Ireland (near Kylemore, Galway).
16. B. caligans A. L. Sm.—Thallus indeterminate, thinnish,
rugose, diffract, fuliginous-black (K + , CaCl). Apothecia small,
plane, obtusely margined, blackish, pale w ith in ; hypothecium
colourless (the perithecium somewhat brownish above) ; paraphyses
concrete, colourless a t the apices ; spores thinly acicular,
indistinctly septate, 0,030-35 mm. long, 0,0015 mm. th ic k ;
hymenial gelatine wine-reddish with iodine.—Lecidea caligans
Nyl, in Flora Ivii. p. 10 (1874); Cromb. in Grevillea ii. p. 140
& xxii. p. 58 ; Leight. Lich. ed. 3, pp. 283, 371.
Eesembling in some respects B. inundata, but very distinct in the
dark colour of the thallus, and in the rather larger apothecia.
The thallus is overrun by a thin Scytonema.
Hah. On rooks in a maritime district.—E. M. Island of Alderney
(the only locality).
17. B. egenula Th. Fr. Lich. Scand. p. 363 (1874).—Thallus
very thinly granulose, greyish (Kf + yellowish), nearly obsolete.
Apothecia small, plane, obtusely margined, blackish or dark-
brown, the margin thickish, a t length evanescent, within pale-
whitish (brownish in the centre) ; paraphyses coherent, clavate
a t the apices; epithecium colourless or faintly coloured; hypothecium
yellow-brown or reddish in thin section ; spores acicular,
simple or indistinctly septate, 0,020-38 mm. long, 0,0015-20 mm!
thick ; hymenial gelatine bluish then wine-red with iodine.__
Lecidea egenula Nyl. in Flora xlviii. p. 147 (1865). L. Leigh-
toniana Larb. ex Leight. Lich. FI. ed. 3, p. 368 (1879); Cromb.
in Grevillea xxii. p. 59.
Exsicc. Larb. Lich. Hb. n. 144.
Allied to E. arceutina, but differs in the much smaller plane
darker apothecia, the usually shorter spores, and the colour of the
hypothecium. The apothecia are somewhat scattered.
Hab. On schistose rocks in an upland tract.—E. M. Doughruagh
Mt. and Lough Feagh, Connemara, Galway.
18. B. arceutina Branth & Rostr. in Bot. Tidsskr. iii. p . 233
(1869).—Thallus effuse, very thin, smoothish or siibgranulose-
verrucose, whitish or greyish, often evanescent. Apothecia
small, sessile, a t first plane with darker margin, then convex,
immarginate, dark-red or blackish and shining, colourless w ith in ;
epithecium brown or brownish ; hypothecium yellowish ; spores
narrowly acicular, straight or slightly curved, 3-15-septate,
0,044-54 mm. long, 0,0015-25 mm. thick ; hymenial gelatine
bluish then wine-red or sordid with iodine.—Lecidea luteola var.
y arceutina Ach. Meth. p. 61 (1803) & Lich. Univ. p. 197 ; var.
fuscella Fr. Summa p. 112 (1846). L. arceutina Nyl. in Flora