11. P. tristicula Th. Fr. tom. cit. ji. 14.—Thallus of brown
globose or subsquamulose scattered granules. Perithecia black,
subglobose, moderate in size, with a punctiform, scarcely
visible ostiole ; peritheciai wall entire, somewhat wrinkled ; paraphyses
none ; spores usually 2 in the ascus, becoming brownish,
muriform, large, 0,060-132 mm. long, 0,021-51 mm. th ick ;
hymenial gelatine wine-red with iodine.— Verrucaria tristicula
Nyl. in Flora xlviii. p. 356 (1865); Carroll in Journ. Bot. iv.
p. 24 (1866); Cromb. Lich. Brit. p. 110; Leight. Lich. Fl.
p. 456 ; ed. 3, p. 488.
Hab. On mosses in mountainous regions.—E. M. Aviemore, Aberdeenshire.
Spores becoming dark-brown.
12. P. theleodes Th. Pr. tom. cit. p. 10.—Thallus greyish-
white, thickish, wrinkled-areolate, with thicker wart-like protuberances,
sometimes almost disappearing. Perithecia partly
enclosed in the warts or superficial, large, hemispherical with a
slight depression round the ostiole ; peritheciai wall black, entire,
thicker over the top ; paraphyses disappearing ; spores 8 in the
ascus, broadly ellipsoid, very large, colourless, then dark-brown,
muriform, variable, 0,060-84 mm. long, 0,024-45 mm. th ick ;
hymenial gelatine wine-red with iodine.— Verrucaria theleodes
Sommerf. Suppl. Fl. Lapp. p. 160 (1826); Cromb. Lich. Brit,
p. 110 ; Leight. Lich. Fl. p. 457 ; ed. 3, p. 489 (incl. f. verrucoso-
areolata). V. verrucoso-areolata Nyl. in Act. Soc. Linn. Bord.
sér. 3, i. p. 438 (1856) & in Maine et Loire Mém. Soc. Acad,
iv. p. 36 (1858) ; Carroll in Journ. Bot. iii. p. 292 (1865).
V. subpyrenophora Leight. Lich. Fl. p. 456 ; ed. 3, p. 486.
Lecanora atra var. verrucoso-areolata Schær. Enum. p. 73 (1850)
fide Nyl. Lioh. Scand. p. 292 (1861). Sphseromphale verrucoso-
areolata Mudd Man. p. 282, t. 5, fig. 119 (1861).
The thallus varies considerably in thickness ; sometimes the perithecia
are sessile and the thallus scarcely visible. There is a distinct
thin blackish wall at the base of the perithecia, the upper portion
being much thicker and easily breaking away. The spores are often
smaller than the size recorded, occasionally not longer than 0,050 mm.
Hah. On rocks.—EisZr. Rather rare in alpine districts of the
British Isles.—E. M. Cwm Idwall, Cwm Cywion and Snowdon,
Carnarvonshire ; Ben Lawers, Perthshire ; Achosragan Hill, Appin,
Argyll ; Craig Tulloch, Blair Athole, Perthshire ; Craig Guie, Braemar,
Aberdeenshire.
Form inundata Th. Fr. tom. cit. p. 11.—Thallus thin,
smooth, somewhat gelatinous. Perithecia semi-immersed in the
thallus.— Verrucaria theleodes var. inundata Nyl. ex Carroll in
Journ. Bot. iv. p. 25 (1866) ; Cromb. Lich. Brit. p. 110 ; Leight.
Lich. Fl. ed. 3, p. 490 (note).
Hdb. On moist rocks.—Bistr. Eare in S.AV. Ireland.—E. M.
Ballaghbeama, Kerry.
^^13. p. scotinospora Hellb. in Vet. Akad. Forli. 1865, p. 478.
-Thallus whitish or greyish-brown, warted-areolate, sometimes
almost obsolete. Perithecia ra th e r large, sessile, prominent,
somewhat depressed round the ostiole ; peritheciai wall incurved
a t the base and almost entire ; paraphyses disappearing; spores 8
in the ascus, ellipsoid, irregular, muriform, brown, 0,026-40 mm.
long, 0,013-21 mm. thick.— Verrucaria scotinospora Nyl. Lich.
fecand. p. 270 (1861); Cromb. Lich. Brit. p. 110; Leight. Licli.
Fl. p. 453 ; ed. 3, p. 485. Sphseromphale scotinospora Mudd Man.
p. 282 (1861).
Hah. On schistose rocks.—EisZr. Rare in alpine regions.—E. M.
Cwm Clwyd, Denbighshire ; Ben Lawers and Ben-y-Gloe, Blair Athole,
Perthshire ; Kylemore, Connemara, Galway.
14. P.HenschelianaLonnr. in Flora xli. p. 631 (1858).—Thallus
greyish or brownish, tliin, cracked. Perithecia rather large,
subglobose or hemispherical, immersed in the thallus with a black
prominent ostiole; peritheciai wall black, almost dimidiate ;
paraphyses disappearing ; spores 8 in the ascus, broadly-oblong,
becoming dark-brown, muriform, large, 0,046-56 mm. long,
0,023-33 mm. th ic k ; hymenial gelatine wine-red with iodine.—
Sphseromphale Henscheliana Koerb. Syst. Lich. Germ. p. 336
(1855). Verrucaria subumbrina Nyl. Lich. Scand. p. 269 (1861)
(fide Th. Fr. in K. Svensk. Vetensk. Soc. Nov. Act. 1877, 8, p. 1 2 );
Carroll in Journ. Bot. iii. p. 292 (1865) ; Cromb. Lich. Brit,
p. 109 ; Leight. Lich. Fl. p. 458; ed. 3, p. 485. V. Henscheliana
Cromb. in Journ. Bot. ix. p. 179 (1871); Leight. Lich. Fl.
p. 457 ; ed. 3, p. 489.
Lxsicc. Larb. Lich. Hb. n. 198.
Hah. On schistose rocks.—Distr. Rare in mountainous districts of
N. Scotland and AAb Ireland.—E. M. Ben Lawers, Perthshire ; Lough
Feagh, Connemara, Galway.
15. P. nigritella A. L. Sm.—Thallus black, effuse. Perithecia
small, black, semi-immersed, somewhat prominent, the ostiole
minute ; peritheciai wall entire ; paraphyses mucilaginous, disappearing
; asci elongate-clavate; spores 8 in the ascus, irregularly
ellipsoid, dark-brown, variously muriform with few irregular
cells, small, 0,21-36 mm. long, 0,09-14 mm. thick (usually
0,020-22 mm. long, 0,010-12 mm. th ic k ); hymenial gelatine
wine-red or tawny-yellowish with iodine.— Verrucaria nigritella
Nyl. in Flora xlviii. p. 357 (1865); Carroll in Journ. Bot. iv.
p. 25 (1866); Cromb. Lich. Brit. p. 110 ; Leight. Lich. Fl. p. 466 ;
ed. 3, p. 497.
Judging from the description similar to if not identical with
P. gothica (Th. Fr. Bot. Not. 1865, p. 112), which differs somewhat
in having more inflated asci and slightly narrower spores. Leighton
quotes Parmelia scruposa var. bryophila, pro parte (Angioc. Lich. t.
1 1 , f. 8 b ) as representing the spores of this species.
II. . X