with iodine.—Carroll in Journ. Bot. iv. p. 24 (1866); Cromb.
Lich. Brit. p. 7 9 ; Leight. Lich, FI. ed. 3, p. 272.
Has been confused with the continental species L. Wulfenii,
which has a whitish tartareous thallus and spreads over mosses in
alpine situations.
Hah. On the earth in alpine places.—HisZr. Bare, found only on
the summits of the highest hills in Scotland.—A. M. Ben Lawers,
Perthshire.
102. L. suhfurva Nyl. in Flora Hi. p. 360 (1872).—Thallus
indeterminate, thinnish or submoderate, areolate-diffract, above
minutely furfuraceous and opaque, brownish-black or greyish-
brown ( K C a C l - ) ; hypotballus black, little visible. Apothecia
small, plane, wrinkled, opaque, often angulose, margined,
black, the margin thin, p e rsisten t; paraphyses slender, irregularly
coherent; epithecium and hypothecium dark ( K - ) ; spores
subglubose, ellipsoid, 0,011-12 mm. long, 0,009 mm. th ick ;
hymenial gelatine deep-blue with iodine.—Cromb. in Grevillea i.
p. 61: Leight. Lich. FI. ed. 3, p. 250.
Viewed superficially might readily be taken for a species allied to
L. furvella. The analytical characters, however, of the fructification
show th a t it belongs to this section near L. inferior Nyl. a Lapland
plant. The thallus spreads extensively over the substratum, and is
■fertile only towards the c e n tre s -th e apothecia being usually somewhat
scattered.
Hah.-—On micaceous rooks and walls in upland situations.—AZsZr
Very local, though plentiful, where it occurs among the Central
Grampians, Scotland.—A. M. Craig Tulloch and Glen Fender, Blair
Athole; also by Looh Earn and Ben Lawers, Perthshire.
103. L. deparcula Nyl. in Flora Iv. p . 361 (1872).—Thallus
determinate, scattered, thin, subareolate, a t times nearly evanescent,
greyish ( K - , C a C l - ) ; hypotballus blackish, only here
and there visible. Apothecia small, slightly prominent, somewhat
difform, subumbonate in the centre, marginate, black,
concolorous within, the margin obtusely turgid, a t times sub!
cren a te ; paraphyses nearly moderate, bluish-green towards the
apices; epithecium dark-bluish; hypothecium brownish-black •
spores ellipsoid, 0,009-12 mm. long, 0,005-7 mm. th ic k ; hy!
menial gelatine deep-blue then dark with iodine.—Cromb. in
Grevillea i. p. 6 2 ; Leight. Lich. FI. ed. 3, p. 311.
A rather inconspicuous plant. The gonidia, as noted by Nylander
are subglobose, 0,004-12 mm. in diameter. The specimens gathered
are for the most part sterile.
Hal. On calcareous stones in alpine localities.—Distr. Extremely
lo ca l; rare on the Grampians, Scotland.—A. M. Summit of Ben-y-
gloe, Blair Athole, Perthshire ; Morrone, Braemar, Aberdeenshire.
104. L. dealhatula Nyl. in Flora Ivii. p . 3 1 5 (1874).__
Thallus subdeterminate, thin, rimóse or subareolate, white (K - ,
>; CaCl — ). Apothecia small, somewhat prominent, thinly mar-
gined, umbonate or a t length subgyrose in the centre, black,
’ concolorous within; epithecium (in thin section) brown; hypothecium
dark-brown; paraphyses moderate, coherent; spores
ellipsoid, 0,010-12 mm. long, 0,006-8 mm. thick ; hymenial
gelatine deep-blue with iodine.—Cromb. in Grevillea iii. p. 23 ;
. Leight. Lioh. FI. ed. 3, p. 287.
In the specimens seen the apothecia are rather scattered and not
very numerous.
Hah.—On schistose rooks in upland tracts of mountainous regions.
, —Distr. Sparingly in N. Wales, the S. Grampians, Scotland, and
N.W. Ireland.—A. M. Cader Idris, Merioneth ; Trefriw, Denbighshire ;
' Stronaohlan, Ben Lawers, Killin, and Looh-na-gat, Perthshire ; Dough-
. ruagh Mt., Galway.
105. L. tabidula Nyl. in Flora Ixii. p. 357 (1879).—
Thallus effuse, scattered, thin, or very thin, unequal, blackish
(K —, CaCl — ). Apothecia minute, plane, slightly margined,
often aggregate, black, concolorous within ; paraphyses not very
well discrete ; epithecium sordid-bluish-black ; hypothecium and
perithecium dark-brown (or reddish-brown in th in section) ;
spores ellipsoid, 0,011-16 mm. long, 0,006-7 mm. th ick ; hymenial
gelatine bliiish then tawny-wine-coloured with iodine.—
. Cromb. in Grevillea viii. p. 112.
The thallus, but little visible, appears only in the immediate
vicinity of the fructification which generally occurs in small, scattered
groups. Very near L. deparcula, but differs in the thallus, the paraphyses,
and the reaction of the hymenial gelatine. Spermogones are
. here and there present with slightly arcuate spermatia, 0,012-14 mm.
long, 0,0005 mm. thick, though, as Nylander conjectures, these may
be foreign, faint traces of another thallus being occasionally visible in
the chinks of the substratum.
Hab. On quartzose stones in an alpine situation.—A. M. Summit
of Ben-y-gloe, Blair Athole, Perthshire (the only locality).
106. L. jurana Schær. Enum. p. 123 (1850).—Thallus effuse,
thin, continuous, subrimulose or scattered, whitish, often almost
obsolete (K —, CaCl — ). Apothecia adnate, somewhat large and
scattered, a t first concave then plane with thickish prominent
flexuose margin, often irregular and 2-3 connate, black, naked,
concolorous within ; paraphyses subcoherent ; hypothecium and
i epithecium blackish; spores ellipsoid, 0,016-18 mm. long,
( 0,010-11 mm. thick ; hymenial gelatine deep-blue with iodine.—
•I Leight. in Ann. Mag. Nat. Hist. ser. 4, iv. p. 199 (1869) ; Lich.
] FL p. 299 ; ed. 3, p. 310.
I In the British specimens the thallus is either rather scattered
;,5 (form dispersa Arnold in Flora li. p. 35 (1868)), or more commonly
I scarcely visible. The apothecia are rather variable, being frequently,
I as Schærer says, minute and several aggregate with a common exeiple.