Forest, H an ts; Cirencester, Gloucestershire; near Lewes, near
Bteyning, Stanmer Park, Glynde, Beeding, Ardingly and Wakehurst,
Sussex ; Ulting, Hockley and Hadleigh Woods, and Epping Forest,
Essex; Cader Idris, Merionetli; Babraham and Madingley Park,
Cambridgeshire; Easby, Kildare, Ayton, and Cliffrigg, Cleveland.
Yorkshire; Barcaldine, Argyll; Eiverstown, Cork; Cld Dromore,
Killarney, Kerry ; Glenarm, Antrim.
6. 0. prosiliens Stirton in Grevillea iii. p. 36 (1874).—
Thallus white or whitish, thin. Apothecia black, prominent,
ovate or oblong ; disc narrow ; margins rounded and prominent;
spores fusiform-ellipsoid, colourless, 3-septate, with a colourless
epispore, 0,020-28 mm. long, 0,006-7 mm. thick ; spermogones
with rod-like spermatia 0,004-6 mm. long.—Leight. Lich. Fl.
ed. 3, p. 403. Specimen not seen.
Evidently very close to 0. betulina, but with longer spores.
Hab. Cn dead decorticated trees ; near Grantown, Invernessshire.
7. 0. saxicola Ach. Syn. p. 71 (1814).—Thallus effuse,
greyish or greenish, or rusty-brown, thin, scurfy. Apothecia
scattered, oblong or ovate, long or short, variously branched or
difformed and a.ngular ; disc slit-like more or less expanded;
margins tumid, rounded, incurved; asci slightly thickened at
the apex, broadly c lav a te ; spores elliptical or elongate-clavate,
colourless, becoming brownish, 3-septate, 0,016-18 mm. long or
somewhat longer, 0,006 mm. thick ; spermogones with rod-like
spermatia 0,004 mm. lo n g ; hymenial gelatine wine-red with
iodine.—Cromb. Lich. Brit. p. 9 8 ; Leight. Lich. Fl. p. 378 pro
parte ; ed. 3, p. 401 pro parte. 0. rupestris Pers. in Ust. Ann.
Bot. xi. p. 20 (1794)?; Leight. in Ann. Mag. Nat. Hist. ser. 2,
xiii. p. 91 (1854); Mudd Man. p. 228 pro parte.
Lxsicc. Leight. n, 243.
Hab. On rocks.—Distr. Somewhat rare in the Channel Islands,
N. England, Wales, and S.W. Ireland.—B. M. Rozel and Boulay Bay,
Jersey; Newton, Cleveland, Yorkshire; Nantgwynant, Snowdon,
Trefriw and Llandudno, Carnarvonshire; Croghan, Killarney, Kerry.
Var. Decandollei Stiz. in Nov. Act. Acad. Leop. Carol, xxxii.
4, p. 26, t. 2, fig. 2 q-z (1865).'—Thallus somewhat thicker than
in the species, seldom absent, yellowish-green or greyish.
Apothecia prominent, massed in small groups, and growing
singly, linear-oblong or ovate, usually simple, obtuse a t the
extremities; spores elongate, rounded a t the ends, 0,021-24 mm.
long, 0,005 mm. thick.—Cromb. Lich. Brit. p. 98 ; Leight. Lich.
Fl. p. 379 ; ed. 3, p. 401. 0. saxatilis DC. Fl. Fr. ii. p. 312
(1805) (non Leight,). 0. saxigena Tayl. in Mackay Fl. Hib. ii.
p. 259 (1836); Leight. in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 93
(1854). 0. rupestris var. saxigena Mudd Man. p. 229 (1861).
Lxsicc. Leight. n. 311.
Hab. On rooks, chiefly calcareous.—Distr. Not common in the
Channel Islands, N. England, Wales, Scotland and S. and W. Ireland.
—B. M. Island of Sark ; near Ayton, Cleveland, Yorkshire ; Cader
Idris, Barmouth and Llyn Gwernon, Merioneth ; Snowdon and Capel
Curig, Carnarvonshire; West Water, Fifeshire; Appin, Argyll;
Mangerton and Dunkerron, Killarney ; Kilkee, Clare ; Lettermore,
Connemara, Galway.
Form clarescens A. L. Sm. Differs from the variety in the
more continuous greenish-white thallus and in the more regularly
scattered short apothecia.—0. saxigena f. clarescens Nyl. in
Flora Ixii. p. 224 (1879) ; Cromb. in Grevillea viii. n. 30 (1879).
Lxsicc. Larb. Lich. Hb. n. 79.
Hab. On rooks.—Distr. Rare in W. Scotland and W. Ireland.—
B. M. Isle of Lismore, Argyll ; Twelve Pins and Kylemore, Connemara,
Galway.
Var. Persoonii Stiz. tom. cit. p. 30, t. 2, f. 2, p and cr.—
Thallus thin, whitish or greyish. Apothecia oblong, small, often
deformed; spores colourless, 3-septate, 0,021-23 mm. long,
0.005-6 mm. thick.—Crom. Lich. Brit. p. 98 ; Leight. Lich. Fl.
p. 380 ; ed. 3, p. 403. Lichen Persoonii Ach. Lich. Suec. Prodr.
p. 19 (1798).
Hab. On rocks.—Distr. Rare in N. Scotland and W. Ireland.—
B. M. Craig Tulloch, Perthshire ; Kilkee, Clare.
Var. gyrocarpa Stiz. tom. cit. p. 29, t. 2, f. 2, e-o.—Thallus
greyish, limited and intersected by black lines. Apothecia
scattered, sessile, roundish, shortly ellipsoid or deformed, rarely
linear ; spores 0,020-25 mm. long, 0,004-6 mm. thick.—Cromb.
1. c. ; Leight. ll. c. 0. gyrocarpa Flot. in Flora viii. p. 345
(1825). Verrucaria umhrosa Tayl. in Mackay PI. Hib. ii. p. 97
(1836).
Distinguished by the intersecting lines of the thallus and by the
usually deformed apothecia. Stizenberger [I. c.) states that the spores
are 2-oelled or up to 7-celled. This condition has not been verified in
the British specimens. The spores are, however, difficult to find in
this variety.
Hab. On rocks.—Distr. Rare in the Channel Islands, S. England,.
N. Scotland and S. and W. Ireland.—B. M. Noirmont, Jersey
Lucoombe, I. of Wight; Carig Mt., Kerry; Adragool, Kylemore,
Connemara, Galway.
8. 0. atrula Nyl. in Flora Ix. p. 565 (1877).—Thallus very
scanty. Apothecia black, short, oblong, simple, prominent,
arranged in a somewhat parallel manner ; disc narrow ; spores
colourless, fusiform-oblong, 3-septate, about 0,016 mm. long,
0,0035 mm. thick.—Cromb. in Grevillea vi. p. 114; Leight.
Lich. Fl. ed. 3, p. 400.
Lxsicc. Larb. Lich. Hb. n. 39.
The only specimens in the British Museum are imperfect and
without asci or spores ; the apothecia are small and rather thickly
scattered over the substratum.
Hab. On mica-schist stones in shady places.—B. M. Kylemore,.
Connemara, Galway (the only locality).