146 CYCLOCARPINE [ PARMELIA 
Distinguished from P. olivacea by the narrower lobes, the dark 
colour, and by the habitat. 
Hab. On rocks in maritime and upland districts.—Distv. Rare in 
W. England and Wales, in 8. Scotland and the N. Grampians, and in 
W. Ireland.—B. M. Malvern Hills, Worcestershire; Caer Caradoc, 
Shropshire; Llandegley Rocks, Radnorshire; Moel-y-golfa, Mont- 
gomeryshire; Douglas Head, Isle of Man; New Galloway, Kirk- 
cudbrightshire ; Port Lethen, Kincardineshire ; Craig Guie, Braemar, 
Aberdeenshire. 
Subsp. Delisei Nyl. in Bull. Soc. Linn. Norm. sér. 2, vi. 
p- 303 (1872).—Thallus larger, and paler in colour, light-brown, 
the lobes broader at the circumference (K(CaCl = f. reddish)).— 
Cromb, in Journ. Bot. xi. p. 133 (1873) & in Grevillea x. p. 25. 
P. olivacea var. Delisei Dub. Bot. Gall. p. 602 (1830); var. 
aquiloides Linds. in Trans. Roy. Soc. Edin. xxii. p. 236 (1859) ; 
Mudd Man. p. 99. P. Delisei Leight. Lich. Fl. ed. 3, p. 129 
(1879). 
Exsice. Bohl. n. 109 pro parte; Larb. Lich. Hb. n. 328 ; 
Leight. n. 291 pro parte. 
To this subspecies refer also the citations Lichen olivaceus pro parte 
and Parmelia olivacea pro parte of various British authors already 
quoted. In old plants the apothecia are rather larger and crowded. 
Hab. On rocks and boulders in maritime and upland districts.— 
Distr. Local in the Channel Islands, 8S. and W. England, N. Wales, 
Central Scotland and §S. Ireland.—B. M. Rozel and La Moye, Jersey; 
Jerbourg, Guernsey ; Helminton and near Penzance, Cornwall; Wem- 
bury, Devon; Shanklin, I. of Wight; Barmouth, Merioneth; Angle- 
sea ; Douglas, I. of Man; near Kendal, Westmoreland ; Loch Creran, 
Argyll; King’s Park, Stirling; Mizzen Head, Cork. 
Var. isidiascens Nyl. ex Cromb. in Grevillea x. p. 25 (1881). 
—Thallus more or less sprinkled with conglomerate stoutish 
concolorous wart-like isidia, which become sometimes whitish- 
sorediate at the apices.—P. isidiotyla subsp. isidiascens Nyl. in 
Flora lviii. p. 8 (1875). 
Exsicc. Bohl. n. 109 pro parte ; Leight. n. 291 pro parte. 
Evidently a distinct variety, as the subspecies is entirely smooth. 
The isidia are generally more crowded towards the centre of the 
thallus. 
Hab. The same as the subspecies.—Distr. Local and scarce in 
the Channel Islands, 8. England, $8. Wales and Central Scotland.— 
B.M. Island of Sark; the Lizard, Roche Rocks, near Penzance and 
Helminton, Cornwall; near Plymouth, Devon; Fifield, Wilts; Bar- 
mouth, Merioneth; Anglesea; King’s Park, Stirling; Lough Dan, 
Wicklow. 
35. P. fuliginosa Nyl. in Flora li. p. 346 (1868).—Thallus 
orbicular or spreading irregularly, membranaceous, appressed, 
lobate, greenish or blackish-brown, crowded with rather elongate 
cylindrical or irregularly formed brownish-black isidia, the lobes 
when bare smooth, shining, rather plane and crenate ; beneath 
