9. B. effusa Arnold in Flora xli. p. 505 (1858).—Thallus
effuse, thin, crustaceous, scurfy, yellowish-green or whitish,
sometimes scarcely visible. Apothecia ra th e r small, scattered
or sometimes several aggregate, a t first plane with a thickish
margin, then convex and immarginate, pale-yellowish-llesh-
coloured, sometimes becoming reddish or brownish ; hypothecium
colourless ; paraphyses slender, subdiscrete, colourless, the epithecium
sometimes thinly brownish ; spores narrowly clavate,
straight or slightly curved, pluri-septate, usually about 0,045
mm. long, 0,001-2 mm. thick, sometimes shorter or sometimes
longer; hymenial gelatine and asci blue with iodine.—Lichen
effusus Sm. Fngl. Bot. t. 1863, two upper figures (1808). Biatora
effusa var. ¡3 intermedia Hepp ex Stiz. in Acad. Cæs. Leop.
Nov. Act. xxx. 3, p. 42, t. 2, f. 17 (1863). Lecidea effusa Leight.
Lich. FI. p. 343 (1871) (excl. vars.); ed. 3, p. 370 (excl . vars.) ;
Cromb. in Grevillea xxii. p. 58 (incl. var. intermedia, excl. vars.
arceutina and hypnæa). L. intermedia Leight. Lich. FI. ed. 3,
p. 368 (1879).
Lxsicc. Larb. Lich. Hb. n. 233; Lich. Cæsar. n. 74.
Eesembles B. arceutina in the character of the thallus and the
long, narrow spores, but differs in the constantly lighter coloured
apothecia, which in some specimens become brownish.
Hab. On trees.—Distr. Eare in the Channel Islands, England,
Wales and Ireland; not recorded from Scotland.—B. M. New Forest,
Hants ; Stowell Park, Gloucestershire ; Penmaenmawr, Carnarvonshire
; Cliffrigg, Cleveland, Yorkshire ; Westport, Mayo ; Lough
Feagh, Connemara, Galway.
Form hemipolia A. L. Sm.—Thallus thin, whitish-grey,
smooth. Apothecia convex, semiglobose, partly pale-brownish,
p artly livid ; epithecium yellowish ; otherwise as in the species.
—Lecidea arceutina f. hemipolia Nyl. in Flora Hi. p. 413 (1869)
nomen.
Characterized by the colour of the epithecium and of the constantly
convex apothecia.
Hab. On the bark of trees in maritime districts in S. England.—
B. M. St. Lawrence, I. of Wight ; near Lymington, Hants.
10. B. prasinoides Oliv. Exp. Syst. Lich. ii. p. 26 (1900).—
Thallus effuse, thin or very thin, subgranulate-leprose, greenish.
Apothecia minute, somewhat plane, obtusely or obsoletely
margined, pale-fiesh-colour, within colourless; paraphyses slender,
colourless a t the apices ; hypothecium colourless ; spores rodshaped
or subfusiform, 1-3-septate, 0,012-21 mm. long, 0,0025-35
mm. thick ; hymenial gelatine and asci wine-red with iodine.—
Lecidea prasinoides Nyl. in Flora xlviii. p. 146 (1865); Carroll
in Journ. Bot. vi. p. 100 (1868); Cromb. Lich. Brit. p. 74;
Leight. Lich. PI. p. 326 ; ed. 3, p. 345.
Hab. On rocks.—B. M. Dinish, Killarney, Kerry.
11. B. carneoglauca A. L. Sm.—Thallus determinate, thin,
subleprose, glaucous-green (K - , C aC l- ) , limited a t the circumference
by a white hypothallns. Apothecia minute, convex,
immarginate, pale- or dull-flesh-coloured ; hypothecium and
epithecium colourless; paraphyses not well discrete ; spores
narrowly fusiform, 1-5-septate, 0,025-40 mm. long, 0,0030-35
mm. th ic k ; hymenial gelatine bluish then tawny-yellow with
iodine,—Lecidea cctrneoglauca Nyl. in Flora Ivi. p. 295 (1873) ;
Cromb. in Grevillea ii. p. 90 ; Leight. Lich. PI. ed. 3, p. 366.
Exsicc. Larb. Lich. Hb. without number.
In our specimens the spermogones alone are p re sen t; they are
minute, urceolate and flesh-coloured with a pale m arg in ; spermatia
oblong, 0,004-5 mm. long, 0,0015 mm. thick.
Hab. On siliceous rooks.—B. M. Eozel, Jersey (the only locality).
12. B. chloroticula A. L. Sm.—Thallus effuse, very thin,
subleprose, greenish (K —, CaCl —). Apothecia very minute,
plane, margined, whitish-flesh-coloured, the margin whitish;
hypothecium colourless; paraphyses not well discrete; spores
thin, acicular, straight or slightly bent, 0,0020-35 mm. long,
00,01 mm. th ick ; hymenial gelatine wine-reddish with iodine.—
Lecidea chloroticula Nyl. in Flora Ix. p. 564 (1877); Cromb. in
Grevillea vi. p. 112 ; Leight. Lich. FI. ed. 3, p. 254.
Exsicc. Larb. Lich. Hb. n. 138.
Closely allied to B. inundata, differing in the very minute pale-
coloured peziza-like apothecia. In our specimen the greenish thallus
spreads over the stone, and the apothecia are crowded in one small
group. The spores are faintly but quite distinctly pluri-septate, and
the slender arcuate spermatia measure up to 0,050 mm. long,
0,0008 mm. thick.
Hab. On mica-schist rooks in a stream in an upland situation.—
B. M. Mweelan, Connemara, Galway (the only locality).
13. B. carneoalbens A. L. Sm.—Thallus greenish-glaucous,
thin, effuse, granulose (K+yellow, CaCl + red). Apothecia pale-
flesh-coloured, sometimes becoming partly dark-coloured, convex,
immarginate; hypothecium colourless; paraphyses concrete,
colourless a t the apices; spores elongate-fusiform, 3-7-septate,
0,023-27 mm. long, 0,0025-35 mm. th ic k ; hymenial gelatine
tawny-wine-red with iodine, especially the asci which are a t first
blue a t the tips.—Lecidea carneoalbens Nyl. in Flora Hx. p. 307
(1876); Cromb. in Grevillea v. p. 26 ; Leight. Lich. FI. ed. 3,
p. 366
Near to B. inundata, but differs in the lighter-coloured apothecia
and in the form of the spores, which are straight and slightly
narrower a t one end. The paraphyses are yellow in the mass.
Hab. On water-washed rocks in a maritime district.—B. M.
Killery Bay, Connemara, Galway (the only locality).