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two British specimens, which are well fertile, the thallus is
almost obsolete It might readily be taken for an ecrustaoeous state
t L. lapzcida, hut differs in the thinner spores. Its nearest ally is
A. iiroTOMCMa Nyl., a plant of the Pyrenees, where this species also
vas originally detected. The spermogones are not unfrequent with
spermatia straight, 0,009-14 mm. long, 0,0005-6 mm. thick.
ITab.—Dn a quartzose boulder in a subalpine situation.—A M
Morrone, Braemar, Aberdeenshire (the only locality).
125. L. silacea Ach. Meth. p. 48 (1803).—Thallus areolate,
the areolæ convex, tumid, smooth, bright ferruginous or
ochraceous-red (K - ,C a C l - ) . Apothecia violet-black,numerous,
scattered or crowded, varying in size, closely adnate on or
between the areolæ, plane or convex with an entire or flexuose
margin ; hypothecium dark-brownish, the base of the asci often
greenish-blue ; paraphyses distinct, violet-black a t the tips'
spores roundish-oblong, rather small, 0,010-11 mm. long’
0,005-6 mm. th ic k .-L e ig h t. Lich. PI. ed. 3, p. 288. L. laviciL
var silacea Mudd Man. p. 209 (1861) (excl. syn.) ; Cromb.
Lieh. f e l t p 7 0 ; Leight. Lich. PI. p. 285? Fatellaria
silacea Hoffm. PI. Lich. i. p. 89, t. 19, f. 2 (1790) ?
snpfli® “ eolæ and the dark hypotheoium separate this
species, as now understood, from the ferruginous-ochraoeous forms of
D Uthoplnla. I t IS impossible to be sure of the citations from
R descriptions are often imperfect. L. silacea
(Engl. Bot. t. 1118) is probably L . lithophila f. ochracea, under
W h ic h It has been quoted.
n Somewhat rare in mountainous districts.—
A.M. Sidlaw Hills and Glen Fender, Perthshire; Glen Callater,
Braemar, Aberdeenshire.
mi, 4essellata Floerke Deutschl. Lich. 4, p. 5 (1819).—
Thallus whitish or greyish, tartareous, areolate, the areolæ
plane or convex (K - ). Apothecia scattered or confluent, sessile,
adnate, black, slightly pruinose, plane or subconvex with a thin
flexuose marg in ; hypothecium colourless; paraphyses loosely
coherent, slightly thickened and brownish-black a t the apices ■
spores ellipsoid, 0,009-12 mm. long, 0,004-6 mm. thick ; h y 4 n ia Î
gelatine blue then sordid, the asci violet-red, with iodine —
Cromb. Lich. Brit. p. 82 ; Leight. Lich. FI. p. 276 ; ed. 3, p. 279.
L. lapicidaYw. cyanea Ach. Meth. p. 38 (1803). L. spilota Fr.
Syst. Orb. Veg. p. 286 (1825); Leight. Lich. FI. p. 277; ed 3,
fisiO )? Pantoshcta var. spilota Ach. Lich. Univ. p. 154
common.—A. M. Ben Lawers, Perth-
snire, Glen Callater, Braemar, Aberdeenshire.
127. L. lapicida Ach. Meth. p. 37 (1803) pro parte.—Thallus
tartareous, thm, minutely cracked-areolate, the areolæ plane,
whitish or ash-grey. Apothecia appressed or adnate, plane or
slightly concave with a th in prominent margin; hypothecium
pale or browDish ; paraphyses loosely coherent, blue-greenish-
black or dark-brown a t the apices; spores ellipsoid, 0,009-13
mm. long, 0,004-6 mm. th ic k ; hymenial gelatine blue then
sordid with iodine.—Mudd Man. p. 209 pro parte ; Cromb. Lich.
Brit. p. 81 pro parte (excl. vars.) ; Leight. Lich. FI. p. 284 (excl.
vars.) ; ed. 3, p. 289 (excl. var.). L. polycarpa Floerke ex
Sommerf. Suppl. _FI. Lapp. p. 149 (1826); Cromb. Lich. Brit,
p. 82 ; Leight. Lich. FI. p. 283 ; ed. 3, p. 288. Lichen lapicida
Ach. Lich. Suec. Prodr. p. 61 (1798).
Exsicc. Johns, nos. 350, 387.
Th. Fries (Lioh. Scand. pp. 491, 493) places A. polycarpa under
L. pantherina, of which he regards L. lapicida as a subspecies.
The only difference between the two is in the reaction with potash ;
in A. polycarpa, the reaction varies from yellow to yellow followed
by red, while in A. lapicida there is usually no colour-reaction.
Pries further states th a t some specimens of lapicida give no reaction
in one part of the thallus, while in another they tinge red. The
reaction of our specimens varies from a faint yellow to crimson.’
Hab. On granitic and schistose rocks.—Aisir. Found chiefly in
mountainous regions.—A. M. Cader Idris, Merioneth ; Llyn Geironydd,
Trefriw ; Nant Francon and Llanberis, Carnarvonshire ; Morrone,
Braemar, Aberdeenshire ; coast of Kincardineshire.
Far. declinans Nyl. Lich. Scand. p. 226 (1861).—Similar to
the type but with a darker hypothecium and nearly ecrustaoeous
thallus (K + yellow, then red).—Leight. in Ann. Mag. Nat. Hist
ser. 3, XIX. p. 403 (1867) ; Cromb. Lich. Brit. p. 81. L. polycarpa
var. declinans Leight. Lich. FI. p. 284 (1871); ed. 3, p. 289
L. declinans Nyl. in Flora 1x1. p. 243 (1878).
n ^ocks in mountainous regions. Specimen not seen.—
; A. M Two doubtful specimens without spores from Ben Lawers,
: '^®’ Braemar, Aberdeenshire, collected and named by
128. L. lithophila Ach. Syn. p. 14 (1814).—Thallus ta rtareous,
whitish or ashy-grey, thin, cracked-areolate, the areolæ
plane (K —, CaCl — ) ; hypotballus black. Apothecia numerous,
moderate in size or small, scattered or aggregate and angular,
plane, brownish-black, velvety and soft, with a thin prominent
flexuose margin; hypothecium colourless or pale; paraphyses
slender, loosely coherent, sometimes with a greenish tinge,
clavate, and blackish-brown a t the tips ; spores ellipsoid, 0,009-12
mm. long 0,005-6 mm. thick ; bymenial gelatine deep-blue with
! P- ; Leight. Lich. FI. p. 285 ; ed.
3, p. 290. '
Exsicc. Cromb. n. 183.
rarely well developed. Differs from other species in the
same gioup in the black velvety apothecia and the thickened apices
tipll ^Vhen the apothecia are very small and the
tûallus almost evanescent it is f. minor Cromb. MS., two specimens