248 LICHENACEI,. [PARMELIA. 
of maceration. In the centre the lacinie are convex and subrugose. 
The apothecia are numerous, chiefly central, becoming somewhat large 
and flexuose. The spermogones are abundant, black, irregularly scattered 
over the surface of the thallus, with spermatia 0,005-6 mm. long, about 
0,001 mm. thick. 7 
Hab. On old walls, rocks, and boulders in maritime and upland regions. 
—Distr. General and common in Great Britain, especially in mountainous 
tracts; rarer in the Channel Islands; apparently rare in Ireland. —B. M.: 
Islands of Jersey and Sark. Dartmoor, Ivy Bridge, and Temple Moor, 
Devonshire; near Penzance and Helminton, Cornwall; Malvern Hills, 
Worcestershire; Charnwood Forest, Leicestershire; near Oswestry, 
Shropshire; Llanbedr, Barmouth, Cader Idris, and Dolgelly, Merioneth- 
shire ; Llandyssil, Cardiganshire; Bangor, Carnarvonshire; Beaumaris, 
Island of Anglesea; Teesdale, Durham; near Kendal, Westmoreland ; 
Ennerdale, Cumberland. New Galloway, Kirkeudbrightshire ; near Mof- 
fat, Dumfriesshire; Ayrshire; Inverary, Crinan Canal, and Appin, 
Argyleshire ; Loch Ard, Ben Lawers, and Aberfeldy, Perthshire; Durris, 
Kincardineshire ; Craig Guie, Braemar, Aberdeenshire. Dunkerron, co. 
Kerry. 
Form isidiata Leight. Lich. Fl. i. (1871) p. 185.—Thallus co- 
vered with densely crowded isidia, except at the circumference ; 
otherwise as in the type.—Leight. Lich. FI. ed. 3, p. 125.—Jmbri- 
caria conspersa f, isidiata Anzi Cat. Lich. Sondr. (1860) p. 28. 
Lichenoides imbricatum viridans, scutellis badiis Dill. Muse. 180, 
t. 24. f. 75 B.— Brit. Exs.: Leight. n. 79 pro parte; Bohl. n. 110. 
Easily recognized by the densely isidioid thallus, in which the laciniz 
are often scarcely visible. It is usually infertile, and when present the 
apothecia are not numerous. 
Hah, On rocks and boulders in upland districts—Distr. Rather local 
in 8.W., W., and N. England, in Wales and 8. Scotland, more frequent 
in the S. and W. Highlards; apparently rare in N.W. Ireland.—B. M.: 
Dartmoor, Devonshire; Withiel and near Penzance, Cornwall; Here- 
fordshire Beacon, Malvern, Worcestershire ; Pont-nedd-Vechan, Breck- 
nockshire; near Dolgelly, Merionethshire; Snowdon, Carnarvonshire ; 
near Kendal, Westmoieland; Ennerdale, Cumberland. New Galloway, 
Kirkcudbrightshire; Appin, Argyleshire; King’s Park, Stirling; Ben 
Lawers and Rannoch, Perthshire; near Cortachy, Forfarshire ; Crathes, 
Aberdeenshire. 
Var. 6. stenophylla Ach. Meth. (1803) p. 206.—Thallus some- 
what effuse: lacinie longer, narrower, more divided and imbricate, 
Apothccia smaller, rare—Mudd, Man. p. 102; Cromb. Lich. Brit. 
p. 34; Leight. Lich. Fl. p. 135, ed. 3, p. 124— Brit. Exs.: Leight. 
n, 79 pro parte. 
Well distinguished by the form of the lacinie. It occasionally pre- 
sents an almost panniform aspect, and is normally glabrous, though some- 
times sparingly isidiifercus. The apothecia are very rare in British 
specimens. 
Hab. On boulders and old walls in upland districts— Distr. Local and 
scarce in 8., Central, and W. England, in N. Wales, in the 8.W. High- 
lands and 8. Grampians, Scotland ; rare in S.W. Ireland.—B. M.: Near 
Penzance, Cornwall; Bardon Hill, Leicestershire ; near Oswestry, Shrop- 
