coherent; epithecium colourless; hypothecium brownish ; spores
very variable, 5-9-septate, 0,028-50 mm. long, 0,007-11 mm.
thick ; hymenial gelatine deep-blue with iodine.—Lecidea luhens
Nyl. in Flora Ivii. p. 311 (1874); Cromb. in Grevillea iii. p. 2 3 ;
Leight. Lich. FI. ed. 3, p. 366.
Differs in the usually lighter coloured apothecia and the larger
spores.
Hab. On trunlis of trees.—E. M. Shiere, Surrey (the only looalitj-).
20. B. subviridescens A. L. Sm.—Thallus effuse, very thin,
greenish or sordid-greenish, opaque, often obsolete. Apothecia
small, convex, immarginate, brown or livid-brown, opaque, dark
within ; paraphyses coherent; epithecium and hypothecium pale
or brownish; spores oblong, simple or 1-3-septate, 0,011-18
mm. long, 0,004-6 mm. th ick ; hymenial gelatine bluish then
wine-red with iodine.—Lecidea subviridescens Nyl. in Flora li.
p. 474 (1868); Leight. in Ann. Mag. Nat. Hist. ser. 4, iii. p. 267
(1869) & Lich. FI. p. 324 ; ed. 3, p. 344; Cromb. Lich. Brit,
p. 71.
Characterized by the darker, thinner thallus, the darker apothecia
and the smaller spores.
Hab. Incrusting mosses or on the ground.—Bistr. Somewhat
rare in the Channel Islands and S. England.—E. M. Boulay Bay,
Jersey ; Ventnor, I. of Wight.
Var. trisepta A. L. Sm.—Thallus subdeterminate or effuse,,
very thin, subgranulose, dark-greyish or blackish, a t times nearly
obsolete. Apothecia minute, irregularly congregate, b la c k ;,
hypothecium colourless; spores obtusely fusiform, 3-septate,
0.0014-22 mm. long, 0,004-5 mm. thick ; hymenial gelatine
bluish then, especially the asci, violet or wine-reddish with iodine.
•—Biatora trisepta Nseg. ex Muell. in Mem. Soo. Phys. Hist. Na t.
Genev. xvi. p. 404 (1862)/d e Th. Fr. Lich. Scand. p. 382 (1874)!
Lecidea ternaria Nyl. in Flora Ix. p. 232 (1877); Leight. Lich.
FI. ed. 3, p. 358 ; Cromb. in Grevillea xxii. p. 58. Lecidea
sahuletorum var. milliaria f. ternaria Nyl. in Not. Sallsk. Faun.
& PI. Fenn. n. ser. v. p. 151 (1866).
Exsicc. Mudd n. 157; Larb. Lich. Hb. without number.
Differs from the type in the darker thallus, and the somewhat
smaller constantly 3-septate spores.
Hah. Cn moss and stones.—EZsir. Eare throughout the British
Isles.—E. M. Baysdale Moor and Lounsdale, Cleveland, Yorkshire;
1. of Lismore, Argyll; Doughruagh Mt., and near Kylemore, Connemara,
Galway.
21. B. lign aria Massal. Ric. Lich. p. 121 (1852) pro parte.—
Thallus effuse, granulose or subpulverulent, thinnish, greyish-
green or whitish or almost obsolete (K + yellowish, CaCl +
reddish). Apothecia small, sessile or adnate, convex, hemispherical,
immarginate, somewhat shining or opaque, blackish ;
paraphyses concrete, dark-greenish-blue or dark-olivaceous a t the
apices; hypothecium pale- or sordid-brown; spores oblong or
narrowly oblong-fusiform, straight or slightly curved, 3-7-septate,
0,016-32 mm. long, 0,005-7 mm. th ick ; hymenial gelatine
bluish, the asci a t length dark, with iodine.—B. milliaria Koerb.
Syst. Lich. Germ. p. 214 (1855); Mudd Man. p. 188. Lecidea
lignaria Ach. in Vet. Acad. Handl. 1808, p. 236 & Lich. Univ.
p. 169. L. milliaria Fr. in Vet. Acad. Handl. 1822, p. 255 ;
Leight. Lich. FI. p. 338 pro p arte (inch f. lignaria & i. saxigena) ;
ed. 3, p. 362 pro p a r t e ; Cromh. in Grevillea xxii. p. 58.
L. geomoea Tayl. in Mackay FI. Hib. ii. p. 124 (1836). L. uliginosa
var. geomoea Ach. Meth. p. 43 (1803). L. sahuletorum var.
milliaria Cromb. Lich. Brit. p. 71 (1870).
Exsicc. Mudd nos. 156, 158; Leight. nos. 210, 238, 386,
388 ; Larb. Lich. Hb. 272; Bohl. n. 8 5 ; Johns, n. 375 (as
Lecidea Turneri).
Externally well characterized by the very numerous small often
crowded or confluent apothecia, and also by their internal structure.
The thallus varies somewhat in colour and form according to the
habitat. Lecidea saxigena Uloth ex Leight. Lich. PI. ed. 3, p. 363 is
incompletely described, but is evidently a saxicolous condition of this
species. It is recorded from Wales and N.W. Ireland.
Hdb. On the ground, usually incrusting mosses, rarely on old
palings, rocks, and stones from maritime to alpine situations.—Bistr.
Somewhat local in Great Britain and Ireland, but usually plentiful
where it occurs; very rare and only saxicolous in the Channel Islands.
—E. M. Eozel, Jersey ; Epping Forest, Essex ; Toy Hill, Kent; Leith
Hill, Surrey; Fairlight Glen, Hastings, Lavington and Chillington
Common, Sussex; near Lyndhurst, New Forest, Hants ; Dartmoor,
Devon; near Penzance, Cornwall; Buxton, Derbyshire; Neescliff
Hill, Shropshire; Llj'n Howel, Dolgelly and Cader Idris, Merioneth ;
Glyder Fawr, Carnarvonshire; Glandwr, Carmarthenshire ; Baysdale
and Guisboro’ Moor, Cleveland, Yorkshire ; Ben Cruachan, Argyll ;
Crianlarioh, Craig Calliach and Ben Lawers, Perthshire; Banchory
Devenick, near Aberdeen, Craig Guie, Braemar, Aberdeenshire; near
Belfast, Antrim; Doneraile Mts., Cork; Dunkerron and Killarney,
Kerry ; near Kylemore, Galway.
Form nigrata A. L. Sm.—Thallus dark, scarcely visible;
hypotballus blackish, predominating. Apothecia b la ck ; spores
fusiform, 0,030-40 mm. long, 0,007 mm. thick.—Lecidea sabule-
torum var. milliaria f. nigrata Nyl. in Not. Sallsk. Faun. & FI.
Penn. n. ser. v. p. 151 (1866).
Perhaps merely an alpine condition, with nearly obliterated thallus
(very sparingly present in the British specimen) and slightly different
spores.
Hdb. Incrusting mosses on rooks in an alpine situation.—E. M.
Summit of Ben Lawers, Perthshire.
22. B. melsena Arnold in Flora xlviii. p. 596 (1865).—
Thallus effuse, very thin, leprose-granulose, sordid-greenish,
II. L