254 LICTEN ACEI. [PARMELIA. 
Hab. On rocks and boulders in maritime and upland districts. — Distr. 
Local in 8. and W. England, N. Wales, Central Scotland, 8. Ireland, and 
the Channel Islands.—B. M.: La Moye, Island of Jersey. Near Shank- 
lin, Isle of Wight; Wembury, Devonshire; near Penzance, Cornwall ; 
Barmouth, Merionethshire ; Island of Anglesea ; Isle of Man; Stavely, 
Westmoreland. Loch Creran, Argyleshire; King’s Park, Stirling. 
Mizen Head, co. Cork. 
(. isidiascens Nyl. Flora, 1875, p. 8.—Thallus more or less 
sprinkled with olive-brown verrucseform isidia, which become whitish- 
sorediate at the apices; otberwise as in the type.—Cromb. Grevillea, 
x. p. 25.—Brit. Hws.: Leight. n. 291 pro parte; Bohl. n. 109 pro 
parte. 
Well characterized by the often crowded and at length thickish isidia, 
which sometimes nearly cover the thallus, and give it an almost panni- 
form appearance. It is rarely seen fertile, the apothecia being but few, 
with the margin sometimes rugose with isidia. 
Hab. On rocks and boulders in maritime and upland districts.— Distr. 
Local and scarce in the Channel Islands, S. England, N. Wales, and 
Central Scotland.—B. M.: Chateau Point, Island of Sark. Near Pen- 
zance and Helminton, Cornwall; Barmouth, Merionethshire ; Island of 
Anglesea; Isle of Man. King’s Park, Stirling. 
25. P. fuliginosa Nyl. Flora, 1868, p. 846.—Thallus orbicular or 
suborbicular, membranaceous, appressed, laciniato-lobed, umbrine- 
badious or olive-black, fuliginoso-furfuraceous or black-isidiose, be- 
neath blackish, sparingly fibrillose; lobes plane, crenate (K_: 
CaCl) nea): Apothecia small or moderate, scattered, pale- or dark- 
brown, the margin thickish, slightly crenulate ; spores 0,009-12 mm. 
long, 0,005-6 mm. thick.—Cromb. Lich. Brit. p. 36; Leight. Lich. 
Fl. p. 134, ed. 3, p. 123.—Parmelia olivacea var. fuliginosa Fr. in 
Dub. Bot. Gall. (1830) p. 602. Parmelia olivacea y. furfuracea 
Scheer., Mudd, Man. p. 100. Lichenoides olivaceum, scutellis levibus 
Dill. Muse. 182, f. 77 8. 
Readily recognized by the peculiar black, setuloso-papillose isidia, 
which are sometimes so dense as to cover the whole thallus and obliterate 
the lobes, except at the immediate circumference ; otherwise sufficiently 
separated from the preceding species by the chemical reaction of the 
medulla with CaCl. The apothecia are rare in this country, especially on 
saxicole specimens, and the spermogones are very rarely visible. 
Hab. On rocks and walls, also on old pales, rarely on trees, in maritime 
and upland districts— Distr. Probably general, though not common, in 
the mountainous regions of Great Britain and Jreland—B. M.: Penzance 
and near St. Breock, Cornwall; Herefordshire Beacon, Malvern, Worces- 
tershire ; Borthwynog, near Dolgelly and Rhewegreidden, Merionethshire ; 
Bettws-y-Coed, Denbighshire ; Haughmond Hill and Stiperstones, Shrop- 
shire; near Ayton, Yorkshire; Stavely, Kendal, Westmoreland. New 
Galloway, Kirkeudbrightshire; Glen Lochay and Blair Athole, Perth- 
shire; Glen Shee, Forfarshire; Portlethen and Durris, Kincardineshire ; 
Till of Ardo, near Aberdeen, and Castleton of Braemar, Aberdeenshire ; 
near Abernethy, Elgin. Near Cork; Dawros River, Connemara, co. 
Galway. 
