of which from Ben Lawers are in the British Museum. Nylander
states th a t the epithecium usually turns reddish when moist.
Hal. On rocks in upland or mountainous regions.—Distr. Somewhat
rare m S.W. and N. England, Wales, and W. Ireland, frequent^
on the Grampians, Scotland.—A. M. Cader Idris, Merioneth ; Cwm
Jugwy, Carnarvonshire; Ben Lomond, Stirlingshire; Stronachlachan,
p!! J a c k ie , Craig Calliaoh, Glen Fender and
ArevH PI P n U ; Achosragan Hill, Appin,
Argyll, Glen Callater and Morrone, Braemar, Aberdeenshire; Apple-
cross, Eossshire.
Form ochracea Nyl. Lich. Scand. p. 227 (1861).—Differs from
the type in the yeliowish or rusty-red colour of the thallus.—
A. daphoena var. ochracea Ach. Lich. Univ. p. 166 (1810) L
tessellata f. ochracea Cromb. Lich. Brit. p. 82 (1871). L lapicida
var ochracea Leight Lich. PI. ed. 3, p. 290 (1879). L. silacea
Ach. Meth p. 48 (p 0 3 ) pro p a r te ; Engl. Bot. t. 1118; Hook, in
bm. Engl. PL p. 178.
m S.W. England, Wales,
p ; Alternan, Cornwall; Beddgelert, Llyn Geironwydd,
Carnarvonshire; Glen Pender and Craig Tulloch, Blair Athole,
ib e r d tn s ^ li i r f
129. L. plana Nyl. in Flora Iviii. p. 448 (1875).—Thallus
efluse, thmnish, areolate-rimose, greyish- or glaucous-white (K - ,
C a C l- , medulla I - ) , often evanescent; hypotballus black.
Apothecia small, adnate, plane, thinly margined, usually crowded,
black the margin e n tire ; paraphyses loosely coherent, narrowly
clavate and dark-brown or greenish-black a t the apices; hypothe-
narrowly oblong, 0,009-12 mm. long,
0,0025-40_mm. th ic k ; hymenial gelatine deep blue with iodine.
Cromb in Grevillea i. p. 173; Leight. Lich. El. ed. 3, p. 290.
L. lapicida subsp. lithophiloidcs Nyl. ex Cromb. Lich. Brit, p 81
(1 8 /0 ); var. lithophiloidcs Leight. Lich. El. p. 285. Lecidella
plana Lahm ex Koerb. Par. Lich. p. 211 (1861).
Exsicc. Leight. n. 157; Mudd n. 178.
Eesembles a srnall condition of the preceding, but is well distin-
Tbe U persistently black apothecia and the narrower spores.
Jm L u 6 Bomewha variable, being either continuous, scabrid o!
smoothish, or inore or less scattered; a t times granulate-verrucose
obs™ete’'-^ 'ihT (4881)), and not unfrequently
Hai. On rooks and boulders, chiefly granitic and schistose in
^®''® 41i®^e in Central
a m ' Np«1 f ^^84®s and among the Grampians, Sco tlan d .-
K iid ^ ; Derbyshire; Cader Idris, Merionethshire;
S S b a ^ U f “ <4 Ingleby, Cleveland, Yorkshire;
S i S s W • Ue I i n®“ ®aI® “ *4 Stronachlachan,EertJistiire , Ben-naboord, Braemar, Aberdeenshire. Killin,
130. L. mesotropa Nyl. in Flora 1. p. 328 (1867).—Thallus
indeterminate, verrucose-areolate, greyish ; the areoiæ rather
convex (K —, K(CaCl)+ reddish). Apothecia small, adnate,
somewhat plane, opaque, margined, blackish or brownish-black,
the margin obtuse, a t length evanescent ; paraphyses slender,
not well discrete ; epithecium brownish ; hypothecium colourless ;
spores ellipsoid, colourless, 0,009-13 mm. long, 0,005-6 mm.
thick ; hymenial gelatine bluish with iodine.—Cromb. in Journ.
Bot. vii. p. 49 (1869) & Lich. Brit. p. 81 ; Leight. Lich. El
p. 277 ; ed. 3, p. 280.
Intermediate between A. lapicida and A. lithophila, the thallus
much resembling the former and the apothecia those of the latter
species. The apothecia have often a biatorine aspect.
Hab. On a gneissio boulder in an upland mountainous region.—
A. M. West slope of Ben Lomond, near Loch Ard, Perthshire (the
only locality).
131. L. mesotropoides Nyl. in Flora Iv. p. 359 (1872).—
Thallus subdeterminate, moderate, verrucose-areolate-diffract
greyish, the areolæ convex (K + yellowish, CaCl — , medulla I —).
Apothecia small, prominent, blackish, a t first plane and thinly
margined, then convex and immarginate; paraphyses slender,
more or less coherent ; hypothecium colourless ; spores ellipsoid,
0,009-11 mm. long, 0,006-7 mm. th ick ; hymenial gelatine
bluish with iodine.—Cromb. in Grevillea i. p. 69; Leight. Lich
FI. ed. 3, p. 282.
_ Distinguished from A. mesotropa by the thalline reactions, the
thinner apothecia and the shorter spores. The two British specimens
are well fertile. The spermogones, here and there visible, have the
spermatia 0,007-0,010 mm. long, scarcely 0,001 mm. thick.
Hah. On calcareous and schistose stones of a wall in an upland
situation.—A. M. Craig Tulloch, Blair Athole, Perthshire (the only
locality).
132. L. mesotropiza Nyl. in Flora Ivi. p. 20 (1873).—Thallus
indeterminate, moderate, verrucose-rugulose, whitish (K + deep
yellow, CaCl — ). Apothecia small or submoderate, more or less
crowded, adnate, black, a t first plane and thinly margined, a t
length convex, immarginate, sometimes slightly pruinose, bluish-
grey within; paraphyses not very discrete; epithecium dark-
greenish-blue; hypothecium colourless; spores ellipsoid, 0,011-
12 mm. long, 0,007 mm. thick ; hymenial gelatine bluish, the
asci violet, with iodine.—Cromb. in Grevillea i. p. 142; Leight.
Lich. FL ed. 3, p. 275.
Externally very similar to the preceding, from which it differs
chiefly in the whitish verrucose thallus and the bluish epithecium.
Hab. On schistose stones of a wall in an upland district.—A. M.
Hill of Ardo, near Aberdeen (the only locality).