BRITISH LICHENS

LE0IDEA r,ECIDEACElE 61
or somewhat largo, adnato, at nrst plane and thinly margined,
at length convex and immarginate, brownish-black or black;
hypothecium colourless; paraphyses concrete, somewhat
fuliginous at the apices; spores oblong-ellipsoid, 15-18 {L long,
5-7 flo thick; hymenial gelatine bluish then sordid with iodine.­
Cromb. in Journ. Bot. xi. 135 (1873); Leight. Lich. Fl. ed. 3, 297.
The species has been found in mountainous regions of Southern and
Northern Europe. The apothecia in the British Museum specimen have
a dense white layer immediately beneath the hymenium and lower
down a dark-brown hypothecium which is absent in the continental
specimens. The species is retained here but the plants from Braemar
might rather be included under L.fuscoatra. The spermatia in L. cenea
are long, acicular and arcuate (fide Th. Fr. Lich. Scand. 457).
Hab. On a mica· schist boulder in a mountainous region.-B. lJI.
Morrone, Braemar, Aberdeenshire (the only locallty).
96. L. nigroglomerata Leight. Lieh. Fl. 252 (1871}.-ThailuB
effuse, subareolate, minutely squamulose, the squamules smooth
and shining, crenulate, glaucous-white, very small, and crowded
round the groups of apothecia (K + yellow, CaCl + yellow),
hypothallus black, little visible. Apothecia black, moderato in
size, crowded and deformed, shining, plane or convex, with a
thickish slIghtly paler margin; hypothecium colourless, lateral
walls thin, dusky-blackish, often continuous under the hypothecium
as a thin dusky line; paraphyses coherent, greenishblack
at the apices; spores ellipsoid, 11-15 flo long, 6--8 {L thick;
hymenial gelatine bluish then sordid-yellow with iodine.-Cromb.
in Journ. Bot. ix. 179 (1871). Lecanora mgroglomerata Leight.
Lich. Fl. ed. 3, 179 (1879).
Exsicc. Cromb. n. 64.
Externally this species has a general resemblance to L. auriculata
var. diducens, but is sufficiently distinguished by the subsquamulose
dispersed thallus and the colourless hypothecium.
Hab. On quartzose stones in bare alpine places.-B. lJI. Summit
of Cairn Gowar, Ben-y-gloe, Blair Athole, Perthshire (the only locality).
97. L. scotinodes Ny!. in Flora lvi. 295 (1873}.-Thallus subdeterminate,
thinnish, unequal, areolate-rimose, dark-greyish.
Apothecia small, convex, immarginate, black, hypothecium
colourless; paraphyses moderate, dark-blue at the incrassate
apices; epithecium K + pale-violet; spores oblong, simple or
occasionally I-septate, 14-18 {L long, 5-6 flo thick; hymenial
gelatine bluish then tawny-wine-coloured or reddish with iodine.­
Cromb. in Grevillea ii. 90; Leight. Lich. Fl. ed. 332.
Allied to L. scotina, a plant of Bavaria, but differs in the esquamulose
thallus, the convex: apothecia, the larger spores and other
characters given. The numerous apothecia are occasionally somewhat
crowded.