Leighton’s Exsicc. n. 189 {L. verruculosa) under L. leucoclinella, but
the British MnseiTin specimen is a form of îiliizocarpon confervoides.
There are no authentic specimens in the herbarium except those
cited from Leighton.
Hab. On rocks.—Distr. Eare in Central England and Wales.—
B. M. Lyth Hill, Shropshire ; Bettws-y-Coed, Carnarvonshire.
6. B. discolor Koerb. Parerg. Lich. p. 185 (I860).—Thallus
pale-greyish-brown, thin, tartareous, minutely cracked-areolate or
almost continuous, the areolæ plane (K + yellow, CaCl + yellow),
limited by a more or less conspicuous dark-brown hypotballus.
Apothecia blackish-brown, minute, numerous, adnate or subinnate,
plane with a thickish persistent margin ; hypothecium colourless ;
paraphyses distinct, dark-brown a t the apices ; spores ellipsoid,’
almost colourless, then dark-brown, the large guttulæ of the cells
connected by a tube, 0,019-21 mm. long, 0,010-11 mm. thick.—
Lecidea discolor Hepp Plecht. Eur. nos. 319 & 320 (1857) : Leight.
Lich. El. ed. 3, p. 325. / >
Exsicc. Johns, n. 356.
Hab. On rooks and stones.—Distr. Somewhat rare in S. and N.
England and S. Ireland.—E. M. Sea-banks between Whitehaven and
St. Bees, Cumberland.
! . B. interpolata A. L. Sm.—Thallus determinate, blackish-
brown or black, minutely squamulose-areolate, the areolæ
appressed, contiguous or dispersed, hypotballus black. Apothecia
black, small adnate, plane, marginate ; hypothecium colourless ;
paraphyses slender not well discrete, the apices clavate, brownish-
black ; spores ellipsoid, greenish or dark-brown, the large guttulæ
of the cells sometimes conjoined by a tube ; hymenial gelatine
blue then dark-violet, the asci wine yellow, with iodine.— Lecidea
interpolata Stirton in Scott. Nat. iv. p. 165 (1877) • Leio-ht.
Lich. El. ed. 3, p. 326. Specimen not seen.
Hab. On rocks. Collected by Dr. Stirton near Garve, Rossshire.
8. B. biloculata A. L. Sm.—Thallus in patches, effuse, silvery-
white. Apothecia black, adnate, small, marginate ; hypothecium
brown_: paraphyses clavate and brown a t the apices ; spores
ellipsoid-fusiform, brown, the two cells connected by a tube
0,015-18 inm. long, 0,008 mm. th ick ; hymenial gelatine deep’
blue with iodine.-—Lecidea biloculata Nyl. in Flora Ix. p. 460
(1 8 /7 ); Cromb. in Grevillea vi. p. 113. Specimen not seen.
Hah. On bark of holly. Collected by Larbalestier near Kylemore,
Connemara, Galway. ^ ’
9. B. polospora A. L. Sm.—Thallus white or glaucous-white,
thin, falmy efffise and somewhat shining, unequal or wrinkled
V ~ r minute, black, plane, with a narrow,
slightly prominent margin becoming somewhat convex and
immarginate ; hypothecium blackish-brown ; paraphyses distinct,
thickish, globular and blackish brown a t the apices ; spores dark-
brown, ellipsoid, with a paler brown, roundish cell a t each apex,
0,020-22 mm. long, 0,009 mm. thick ; hymenial gelatine deep
blue with iodine.—Lecidea polospora Leight. in Trans. Linn. Soc.
ser. 2, i. p. 241, t. 33, figs. 4-6 (1878), & Lich. El. ed. 3, p. 313.
Specimen not seen.
Eesembling E. myriocarpa, but distinguished by the peculiar
spores which are 3-oelled, though described by Leighton as polari-
bilocular.
Hab. On hawthorn.—Distr. Collected by Larbalestier at Ballynahinch,
Galway.
10. B. myriocarpa Mudd Man. p. 217 (1861), (incl. var.
punctiformis).—Thallus effuse, greenish-grey or blackish, unequal,
granular or pulverulent (K —, CaCl —), sometimes evanescent.
Apothecia minute, plane or convex, with a thin disappearing
margin ; hypothecium blackish-brown; paraphyses discrete,
clavate or capitate and dark-brown a t the extreme tips ; spores
oblong, dark-brown, rarely constricted, epispore distinct,
0,009-16 mm. long, 0,004-8 mm. th ic k ; hymenial gelatine deep
blue with iodine.—Fatellaria myriocarpa DC. EL Fr. ii. p. 346
(1805). Lichen graniformis With. Arr. ed. 3, iv. p. 7 (1796)
fide Cromb. in Grevillea xii. p. 57 (1883) (non Hagen).
L. pinicola Ach. Prod. Lich. Suec. p. 66 (1798); Engl. Bot.
t. 1851, fig. 1. Lecidea pinicola Borr. ex Hook, in Sm. Engl. Bot.
V . p. 176 (1833). L. myriocarpa Nyl. in Act. Soc. Linn. Bord.
ser. 3, i. p. 387 (1856)|; Cromb. Lich. Brit. p. 88; Leight. Lich.
EL p. 307; ed. 3, p. 319; f. pinicola Leight. I. c.
Exsicc. Bohl. n. 102, Carroll Lich. Hib. n. 20 ; Mudd nos. 189,
190; Leight. nos. 63, 181; Larb. Lich. Hb. nos. 32, 33
(f. sapropliila), 34, 69 (f. leprosa) 147, 229, 266, 343, 344 ; Johns,
nos. 358, 359, 389, 390 (f. leprosa).
Externally resembling Lecidea parasema, but with usually smaller
apothecia, a character specially emphasized in var. punctiformis
Mudd. Spermogonia are somewhat frequent, the spermatia cylindrical,
curved or undulated, 0,018-23 mm. long, 0,001 mm. thick.
The thallus varies from being th in and almost obsolete to more or
less granular or pulverulent, and these variations have been described
in a number of forms by Leighton. In Lich. El. ed. 3, p. 319, he
records two forms with an evanescent thallus, f. guercicola found on
oaks, and f. sapropliila (non Lecidea parasema var. sapropliila Ach.)
on decaying wood, with somewhat larger apothecia. Among saxicolous
forms he distinguishes f. areolata (in Grevillea v. p. 84 (1876)
and Lich. FL ed. 3, p. 320), characterized by the minutely cracked-areolate
thallus ; f. leprosa ill. c.), in which the greyish thallus has become
entirely p u lv erulent; also f. eorustacea and f. opegrapliina without
any visible thallus, the latter further characterized by the apothecia
being more or less clustered in lines. E. vernicoma Tuckerm. Gen.
Lioh. p. 187 (1872) (Lecidea vernicoma Leight. Lich. FL ed. 8, p. 321)
has been recorded by Larbalestier from Jersey, but the specimens