Var. parellaria A. L. Sm.—Paraphyses usually darker a t
the tip s; spores remaining longer 1-septate, sometimes also 2- or
3-septate.—Lecidea parellaria Ny\. in Flora lix. p. 239 (1876);
Cromb. in Journ. Bot. xiv. p. 362 (1876); Leight. in Trans.
Linn. Soc. ser. 2, i. p. 238, t. 32, figs. 11 & 12 (1878) & Lich. FI.
ed. 3, p. 387.
Lxsicc. Larb. Lich. Hb. n. 189.
Hab. On the thallus of Lecanora parella.—JDistr. Eare in S.
England, Wales and W. Ireland.—B. M. Fairlight, Hastings, Sussex;
near Fishguard, Pembrokeshire; Diganwy near Conway, Carnarvonshire;
Doughruagh Mt., Connemara.
2. L. glaucomaria A. L. Sm.—Apothecia growing on a
small pale or brown deformed patch of the host-thallus, small,
brownish-black, clustered, sessile, plane with a thickish, paler,
often subflexuose ma rg in ; hypothecium blackish-brown, thin, the
hymenium brownish; paraphyses indistinct, coherent, thickened
and black a t the apices; spores oblong-ovoid, 3-septate, becoming
brownish, 0,021-25 mm. long, 0,008-9 mm. th ic k ; hymenial
gelatine pale-blue then wine-red with iodine.— Lecidea glaucomaria
Nyl. in. Bot. Not. 1852, p. 177, fig. 10 & 1853, p. 99 ; Carroll
in Journ. Bot. iii. p. 291 (1865); Leight. in Trans. Linn. Soc.
ser. 2, i. p. 238, t., 32, figs. 9 & 10 (1878) & Lich. FI. ed. 3,
p. 389. Specimen not seen.
Carroll (I. a.) quotes as a synonym of this species, ScMsmatomma
amylacetiin var. candidum Mudd, a variety founded on Lichen candidus
Sm. (Engl. Bot. t. 1188), which was considered by Leighton as
synonymous with his Lecidea Turneri, and has been already described
as Bilimbia candida (p. 137).
Hah. Parasitic on the thallus of Lecanora glaucoma, not to be
confounded with Arthonia glaucomaria, which grows on the
apothecia of the same lichen.—JDistr. Eare in S.W. IVales (Goodwick
Bay, Pembrokeshire).
3. L. plumhina Anzi Comm. Critt. Ita l. i. p. 158 (1861).—
Apothecia small, black, sessile, solitary or aggregate, plane with
a thin margin, then convex and immarginate; hypothecium
b rown; paraphyses conglutinate ; spores narrowly fusiform, 3-
septate, brownish, 0,022 mm. long, 0,003 mm. thick.
The only specimen in the British Museum, collected by Eev. W.
Johnson, and marked Lecidea plumhina, has somewhat large spores,
0-020-35 mm. long, 0-003-4 mm. thick, the paraphyses are stout,
clavate, globose, and bluish-black at the tips.
Hab. On the thallus of Coccocarpia plúmbea.—B. M. Borrowdale,
near Keswick, Cumberland.
4. L. scapanaria A. L. Sm.-—Thallus whitish, effuse, minutely
granular-areolate. Apothecia black, appressed, plane or slightly
convex, marginate, blackish w ith in ; hypothecium brownish-black ;
spores oblong or ellipsoid-fusiform, brown, 3-septate, 0,019-23
mm. long, 0,008 mm. th ic k ; hymenial gelatine deep-blue with
iodine.—Lecidea scapanaria Carrington in Trans. Bot. Soc. Edin.
vii. pp. 382 & 411, t. 10, fig. 4 (1863); Cromb. Lich. Brit,
p. 8 7 ; Leight. Lich. FI. p. 358 ; ed. 3, p. 387. L. persimilis
Nyl. in Sallsk. Faun. & El. Fenn. n. ser. i. p. 237 (1859)?
Stirton in Grevillea ii. p. 71 (1873); Leight. Lich. FI. ed. 3,
p. 391?
A doubtful lich en ; the alteration in form of the hepatic noted by
Carrington rather indicates a fungoid parasite. Further examination
with fresh material is desirable.
Hab. On hepatics. Eare in S. and W. Ireland and (fide Stirton)
in Central and B. Scotland.—B. M. Killarney, Kerry; Doughraugh
Mt., Connemara, Galway.
78. RHIZOCARPON Ramond in DC. El. Fr. ii. p. 365 (1805).
Diplotomma Elot. in Bot. Zeit. viii. p. 381 (1850) pro p a rte ;
Mudd Man. p. 218. (PI. 15.)
Thallus crustaceous, usually with a distinct, dark-coloured
hypotballus, or hypotballus sometimes wanting (Diplotomma).
Algal cells Protococcus. Apothecia usually dark-coloured and
carbonaceous, immarginate or with a proper margin only; asci
8- or fewer-spored; spores ellipsoid or oblong, mostly rather
large, septate and muriform, colourless or brown, usually with a
hyaline, mucilaginous epispore (halonate).
The genus Diplotomma, as understood by Mudd, included those
species in which the hypothallns was but little developed and the
apothecia surrounded by the thallus to form a spurious margin.
1. Rh. perlutum A. Zahlbr. in Engl. & Prantl. Pflanzenf. i.
1*', p. 138 (1905).—Thallus subdeterminate, thin, continuous,
rimóse, glaucous-white or glaucous-ochraceous (K—, CaCl — ).
Apothecia somewhat large, plane, margined, rusty-red or rusty-
brown, within - subconcolorous, not carbonaceous, the margin
usually p a le r; paraphyses slender, coherent; epithecium and
perithecium yellow-reddish in thin section; hypothecium dark-
red in the middle; spores ellipsoid-oblong, muriform, colourless,
0,030-42 mm. long, 0,013-16 mm. th ick ; hymenial gelatine
bluish, the asci tawny-wine-coloured with iodine. — Lecidea
perluta Nyl. in Elora lix. p. 575 (1876); Cromb. in Grevillea v.
p. 1 0 6 ; Leight. Lich. El. ed. 3, p. 380.
Has much the aspect of Bh. ochrotropa, a plant of Finland and
Madeira, but the apothecia are more brightly coloured; they are
scattered and occasionally approximate.
Hdb. On moist quartzose rocks in an upland mountainous
situation.—B. M. Erriff River, Connemara, Galwaj^.
2. Rh. (Ederi Koerb. Parerg. Lich. p. 232 (1861).—Thallus
effuse, thinnish, minutely granular, areolate, yellowish-ferruginous
(K —, CaCl —, medulla I + bluish). Apothecia small,