436 LICHENACEI. [LECANORA. 
May readily be distinguished from the allied species by the colour of the 
thallus and of the minute apothecia. These are usually crowded, at first 
concave, becoming in age convex and immarginate. The spermogones, 
rarely visible in our specimens, have the spermatia 0,011 mm. long. 
‘Had. On old pales and the trunks of firs in lowland and upland situa- 
tions.—Distr. Only a few localities in Great Britain and Ireland; no 
doubt often overlooked.—B. M.: Near Millhill and Edgware, Middlesex ; 
near Worcester; Tugford Churchyard, Shropshire. Appin, Argyle- 
shire; near Loch Tummel, Perthshire. Maam, Connemara, co. Galway. 
Var. 6. ochrostoma Koerb. Par. Lich. 7. c.—Apothecia sub- 
biatorine, convex, yellowish- or rusty-red, epruinose, immarginate. 
—Leight. Lich. Fl. ed. 3, p. 174 (exel. loc. cit.) ; Cromb. Grevillea, 
xvili. p. 69. 
Differs in the form and colour of the naked biatoroid apothecia. . In 
the few British specimens seen the thallus is almost obsolete. 
Hab. On old pales in wooded districts.—Distr. Only sparingly in S. 
and W. England.—B. M.: New Forest, Hants; Braydon Forest, Wilt- 
shire, 
Subsp. L. glaucella Nyl. ex Cromb. Grevillea, xix. (1891) p. 60. 
—Thallus glaucescent, at times subevanescent. Apothecia sub- 
livid, glauco-pruinose, the thalline margin entire, subpersistent ; 
spores 0,009-13 mm. long, 0,003-4 mm. thick.—Lecanora albella 
var. glaucella Flot. Lich. Exs, un. 848 (1850). 
Characterized by the colour of the thallus and apothecia, which entitle 
it to rank as a subspecies according to Nyl. im tt. The few British 
specimens are well fertile. i 
Hab. On the bark of pine trees in an upland district.—Distr. As yet 
only very sparingly in N.W. England.—B. M.: Staveley, near Kendal, 
Westmoreland. ; 
123. L. fugiens Nyl. Flora, 1873, p. 289.—Thallus effuse, very 
thin, granulate, scattered, glaucous or pale-whitish-yellow (K + yel- 
low, CaCl+ orange). Apothecia minute, sessile, whitish-isabelline; 
the thalline margin entire or sometimes crenulate; spores ellipsoid, 
0,009-0,013 mm. long, 0,005-6 mm. thick ; paraphyses slender ; 
hymenial gelatine bluish, then (especially the thece) tawny wine- 
coloured with iodine-—Cromb. Grevillea, ii. p. 89; Leight. Lich. 
FI. ed. 3, p. 184. 
Near L. piniperda (ex Nyl. l.c.), but is well distinguished by the 
characters given. In the two specimens seen the thallus is scattered 
with the granules scarcely, or rarely, concrescent. The minute apothecia 
are scattered, or here and there a few together. The spermogones have 
the spermatia arcuate, 0,012-16 mm. long, 0,0005 mm. thick, 
Hab. On rocks in maritime districts.— Distr. Extremely local and 
scarce in the Channel Islands and N.W. Ireland.—B. M.: Rozel, Island 
of Jersey, Near Salrock, Connemara, co. Galway. 
