Brit. p. 63 ; Leight. Lich. FI. p. 317. L. diluta Leight. Lich.
FI. ed. 3, p. 343 (1879).
Exsicc. Leight. n. 80 ; Mudd n. 145; Larb. Lich. Hb. n. 18/.
Has, like the preceding, been frequently regarded as a species of
Lecidea, section Biatora. I t is a rather inconspicuous plant from the
thallus being little visible and from the minute fructification. The
apothecia are numerous and usually somewhat scattered, with the
margin slightly prominent. In some situations they are paler, nearly
whitish, and here and there congested (f. leucostigma Leight. Lich.
FI. ed. 3, p. 344).
Hab. On the trunks of old firs in maritime and upland districts.—
HisZr. Somewhat local in Great Britain and Ireland; rare
in the Channel Islands.—B. M. Rozel, Jersey; Ulting, Hadleigh
Woods, Stanstead Mount Fitchet and Hockley Woods, Essex;
Midhurst and Woolstonbury, Sussex; Brockenhurst and near Stoney
Cross, New Forest, Hants ; Sapperton, Gloucestershire; near Newmarket,
Cambridgeshire ; Twycross and Gopsall, Leicestershire;
Welshpool, Montgomeryshire; Bettwys-y-Coed, Denbighshire; Shrewsbury,
Shelton and Llanforda, Shropshire; Costessy, near Norwich,
Norfolk; Cliffrigg, Cleveland, Yorkshire; Craggy Park, Staveley,
Westmoreland ; Barcaldine, Argyll; Glen Falloch and Ben Lawers,
Pe rthshire; Durris, Kincardineshire ; near Cork; Glenstale, Tipperary;
near Limerick, Glare.
7. B. jejuna A. L. Sm.—Thallus dark-grey or bluish-grey-
green, thin, effuse, continuous or slightly cracked. Apothecia
minute, prominent, pale-waxy-reddish with a thickish pale
margin ; hypothecium colourless ; epithecium yellowish ; spores
ellipsoid, 0,018-23 mm. long, 0,007-9 mm. thick ; hymenial
gelatine blue then violet with iodine.—Lecanora jejuna Nyl. in
Flora Iviii. p. 442 (1875). Lecidea suhdiluta Leight. in Trans.
Linn. Soc. ser. 2, i. p. 145, t. 22, figs. 13-16 (1876) & Lich. FL
ed. 3, p. 340.
Exsicc. Larb. Lich. Hb. n. 846.
Hah. On siliceous rocks, rare.—B. M. Boulay Bay, Jersey (the
only locality).
8. B. Arnoldi KrempeUi. in Flora xxxviii. p. 72 (1855).—
Thallus effuse, thin, subleprose, whitish (K —, CaCl —). Apothecia
small, sessile or adnate, a t first concave, margined, a t length
almost plane and subimmarginate, saffron-reddish, the margin
paler; paraphyses slender, subdiscrete; epithecium and hypothecium
deep-yellow; spores oblong, normally 1-septate (at times
obsoletely 3-septate), 0,013-18 mm. long, 0,005-6 mm. th ick ;
hymenial gelatine bluish then wine-red with iodine.—Lecidea
Arnoldi Nyl. in Flora Ixii. p. 223 (1879); Cromb. in Journ. Bot.
lix. p. 361 (1876); Leight. Lich. FI. ed. 3, p. 340.
From the appearance of the young apothecia might at first sight
be taken for a Gyalecta. The thallus is often scarcely distinct, and is
then more or less confused with the substratum. In the British
specimens the apothecia are minute and rather scattered.
Hab. On shaded calcareous rooks in mountainous tracts.—Bistr.
Only in N.W. Ireland and the S.W. Highlands, Scotland.—B. M.
Achosragan Hill, Appin, Argyll; Twelve Pins, Connemara, Galway.
Var. luteella A. L. Sm.—Thallus thin, often in white
patches. Apothecia colourless within, the asci usually thick
and solid a t the apice s; spores oblong or oblong-fusiform,
0,016-23 mm. long, 0,006-7 mm. thick.—Lecidea luteella Nyl.
in Flora xlviii. p. 6 (1865); Leight. in Ann. Mag. Nat. Hist,
ser. 3, xvii. p. 62 ; Cromb. Lich. Brit. p. 7 3 ; Leight. Lich. FI.
p. 322 ; ed. 3, p. 339. Specimen not seen.
Differs from the type in the colourless hypotheoium and epithecium
and in the slightly larger spores.
Hab. On calcareous rocks in upland districts.'—Distr. S. England
(Eastbourne, Sussex) and N.E. Ireland (Sheepwalk, Armagh).
Subsp. delutula A. L. Sm.—Thallus very thin, a t length
rimóse, greyish-green. Apothecia minute, usually gyalectoid, pale-
yellowish-flesh-coloured ; spores 0,012-16 mm. long, 0,004-5 mm.
thick.—Lecidea delutula Nyl. in Flora Ixii. p. 223 (1879);
Cromb. in Grevillea viii. p. 30.
Characterized chiefly by the differently coloured thallus, and the
paler, smaller apothecia. In the two specimens seen, which are well
fertile, the thallus is scattered and only here and there visible.
Hdb. On moist siliceous ferruginous rooks in a mountainous
district.—B. M. Lough Feagh, Connemara, Galway (the only locality).
9. B. bseomma A. L. Sm.—Thallus indeterminate, thin,
opaque, unequal, faintly cracked, glaucous or yellowish-white
(K + yellow, CaCl — ). Apothecia moderate, plane, subangulose-
difform, pale-reddish, livid or livid-brown, with a white, thickish,
epithalline m a rg in ; paraphyses somewhat slen d e r; epithecium
yellowish-granulose; spores oblong, 0,010-18 mm.long, 0004-6 mm.
thick ; hymenial gelatine bluish th en tawny-wine-red with iodine.
—Lecanora brnomma Nyl. in Flora lix. p. 233 (1876). Lecidea
bseomma Nyl. in Flora Ix. p. 459 (1877); Leight. Lich. FI. ed. 3,
p. 221. L . rupicola Nyl. I. c. pp. 228, 562 ; Cromb. in Grevillea
vi. p. 19 ; Leight. Lich. PI. ed. 3, p. 337.
Exsicc. Larb. Lich. Hb. n. 26.
Hab. On mica-sohist rooks near the sea.—B. M. Letterfrack,
Connemara, Galway (the only locality).
Var. glaucocarnea A. L. Sm.—Thallus determinate, rugulose
or subleprose, cracked-areolate, glaucous-green. Apothecia pale-
flesh-coloured or livid, sometimes slightly pruinose, the margin
somewhat paler, a t length evanescent.—Lecidea glaucocarnea
Nyl. in Flora Ix. p. 459 (1877). L. cmsiolepra Nyl. in Flora
Ixiv. p. 532 (1881); Cromb. in Journ. Bot. xx. p. 275 (1882).
I 2