subimbricate. Their margins are at times
M u iih h as c'^ not'u n freq u en tly
£ e ¿acuTár " p e ;m a tia , 0 05-6 min. long, 0,0008 mm thick
(fide Nyl! Lich. Env. Par. p. 77). Our British specimens are for the
most part well fertile.
Hal. On cretaceous and calcareous
d is tr ic ts .-A « ir . Only a few localities in England N. Wales, and the
Highlands of Scotland; not seen from
Downs, Surrey; Newhaven, Sussex; Gogmagog Hills, Cambiidge,
Great Orme’s Head, Carnarvonshire ; Teesdale,
Lismore, Argyll; Craig Calliaoh and Ben Lawers, P e ith sh ire , Clora
Mts., Forfar.
11 L lug u h ris Sommerf. Snppl. FI. Lapp. p. 143 (1826) pro
parte;' Nyl. fn Bot. Not. p. 176, fig. 6b (1 8 5 2 ).-T h a llu s indeterminate,
thickish, minutely squamulose, granulose-concrete, broken
up into crumb-like portions, brownish- or chocolate-pey (K - ,
C aC l - ) ; hypothallns black, apothecia small or submoderate,
superficial, plane, margined, opaque, black, withm greyish-white
tbe margin thickish, prominent, entire, persistent, occasionally
subflexuose; paraphyses slender, very loosely coherent, thickened
a t the apices; epithecium dark-green; hypothecium blackish-
brown ; spores spherical, halonate, 0,008-9 mm. in diam .; hyme-
S gelatine bluish with iodine. - Lindsay in Quart Journ._
Microsc. Sci. V. p. 177, t. 11 (1857); Cromb. Lich. Brit. p. 85
Leight. Lich. FI. p. 255 ; ed. 3, p. 246. Scheereria luguhns K o e rk
Syst. Lich. Cerm. p. 232 (1855); Mudd Man. p. 213, t. iv. hg. /8
^^^S'sicc. Cromb. n. 9 1 ; Mudd n. 183.
Nylander has discussed and determined the nomenclature ot
this Man! (Lioh. Scand. pp. 233, 293 (1 8 6 1)),. Sommerfelt s original
snecimen having included two distinct species, L. caudata J i y l .
and L. luguhris. I t is well characterized by the ,,U®
uniseriate in the narrow, elonpte-cylindrical asci The thallus
which usually spreads extensively, is composed of very minute oi
subminute, crowded, sublohulate, more or less convex squamules
eventually obliterating the hypotballus. The
larger planer and more discrete when the plant is muscioolous. l b
numerous hypotheoia are generally somewhat scattered. The spermogones,
not often visible, are punotiform, black, with short, cylindrical,
straight spermatia.
Hah. On rooks and boulders, granitic and
incrusting mosses, in mountainous districts.—Distr. Found only
N Wales N. England and among the Grampians, Scotland ; not
fe'en from H e land^ -A . M. Cader Idris, Merioneth ; Ayton, Kildale
Moor, Cleveland, and Cronkley Scar, Yorkshire; High Force, Tees
dale, Durham ; Ben Lawers, Craig Tulloch and Glen Fender, Blair-
Athole, Perthshire ; Morrone, Braemar, Aberdeenshire.
Var. lugubrior A. L. Sm.—Thallus more or less minutely
granular, effuse, not squamulose, greyish- or dark-browmsh on a
black hypotballus. Apothecia scattered, black, small with a thick
tumid margin; spores uniseriate in the ascus, with a very thick
border, almost cuboid a t first from compression, larger th an in
the type, about 0,012 mm. in diameter.
The three specimens collected by Crombie are all from one locality
One of them Nylander had recognized as distinct from, though closely
allied to L. luguhris, and had given it a specific name which we have
adopted for the variety.
Hab On the schistose stones of an old wall.—A. M. Glen Pender
Blair Athole, Perthshire.
12. L. confertula Stirton in Trans. Glasgow Soc. Nat. p. 86
(1875).—Thallus pallid-cinereous, crustaceous, squamulose, the
squamules small, contiguous or dispersed (K —, CaCl —). Apothecia
dark-brown, minute, numerous, nearly plane with an obtuse
margin, often contiguous; hypothecium colourless; paraphyses
almost coherent, clavate and brown a t the apices, spores ellipsoid
0,010-13 mm. long; hymenial gelatine blue then reddish-violet
with lodme especially the asci.—Leight. Lich. PI. ed, 3, p. 243
Specimen not seen.
Perttshir(f° rocks. Collected by Dr. Stirton near Killiecrankie,
13. L. endocyanea Stirton in Scott. Nat. iv. p. 165 (1877)__
Thallus blackish, squamulose-diffract, the squamules plane or
somewhat convex, appressed ( K - , C aC l- ) . Apothecia brownish-
black, sessile, small, a t first urceolate, then plane or convex and
immarginate, internally nearly all, but especially upwards of a
violet colour ; hypothecium brownish or nearly colourless •
paraphyses distinct, slender, closely intertwined a t the apices •
spores ellipsoid or oblong-ellipsoid, 0,011-14 mm. long, 0,006-7
mm. thick ; hymenial gelatine blue then yellowish with iodine.—
-Beight. I. c. Specimen not seen.
Hab. On rooks. Collected by Dr. Stirton in Island of Mull.
sporeta Stirton I. c. p. 166.—Thallus whitish squamulose,
the squamules dispersed, plane or somewhat convex and
sometimes crenulate (K - , CaCl - ) . Apothecia small, brownish-
ack, crowded, adnate, plane, obtusely margined, somewhat
Sinning, hypothecium colourless ; paraphyses not well discrete
apices; spores ellipsoid, 0,011-15 mm. long!
_U,UU5-b mm. th ick ; hymenial gelatine blue then brownish with
lodme. Leight. I. c. p. 244. Specimen not seen.
Hab. On rocks. Collected by Dr. Stirton in Island of Mull.
15. L. pissodes Stirton I. c.—Thallus dark brownish-black
squamulose, di®act the squamules small, somewhat concave or
p ane (K_- C aC l- ) . Apothecia black, small, crowded, innate,
plane, slightly margined; hypothecium colourless; paraphyses