PARMELIA | PARMELIACEX: 145 
and Cader Idris, Merioneth ; Conway Mt., Cwm Idwal, and Llanberis, 
Carnarvonshire; Holyhead and Anglesea; near Malloch, Derby; 
Cleveland, Yorkshire; near Egglestone and Teesdale, Durham; 
Kentmore, Westmoreland ; Cumberland; Cheviots, Northumberland ; 
Moffat, Dumfriesshire ; New Galloway, Kirkeudbrightshire ; Dalmahoy 
Crags near Edinburgh; Appin, Argyll; Killin, Ben Lawers, Ben 
Chroin, the Trossachs, Rannoch, Abernethy and near Dunkeld, Perth- 
shire; Canlochan and Clova, Forfarshire; Durris, Kincardineshire ; 
near Invercauld, Morrone, Glen Dee, Braemar, near Aviemore and 
Ben Nevis, Invernessshire ; Applecross, Rossshire ; Dunkerron and 
Caher, Kerry; Corraun and Achill Island, Mayo. 
Var. panniformis Ach. Meth. p. 204 pro parte.—Thallus 
more or less spreading, divided into narrow lacinie which are 
crowdedly imbricate. Apothecia as in the species.—Cromb. in 
Grevillea xv. p. 75 (1877) incl. ff. glomulifera and subconcentrica 
& Monogr. i. p. 244. P. saxatilis var. panniformis Cromb, Lich. 
Brit. p. 34 (1870); Leight. Lich. Fl. ed. 3, p. 128; var. 
omphalodes ff. subconcentrica and glomulifera Cromb. in Journ. 
Bot. x. p. 307 (1872); form glomulifera Leight. Lich. FI]. ed. 3, 
p. 126 (1879). 
Exsicc. Johns. n. 189. 
A densely imbricate form; very rarely the lobes crowd over each 
other in many layers (f. swhconcentrica). On specimens from Cwm 
Idwal, Carnarvonshire, and Morrone, Aberdeenshire, there are gall- 
like formations of upright massed isidioid outgrowths (f. glomulifera), 
some rare growth condition rather than a true form. 
Hab. On rocks and boulders in upland and subalpine regions.— 
Distr. Somewhat rare, though plentiful where it occurs in S.W. and 
N.W. England, N. Wales, 8. Scotland, on the Grampians and in 
W. Ireland.—B. M. Near Penzance and Helminton, Cornwall; Hay 
Tor, Dartmoor and Didsworthy, Devon; Stiperstones Hill, Shrop- 
shire; Llyn Gwrionydd, Merioneth; Cwm Idwal, Carnarvonshire ; 
Cumberland ; New Galloway, Kirkcudbrightshire; Ben Cruachan, 
Argyll; Ben More and Ben Lawers, Perthshire; Morrone, Braemar 
and Ben-naboord, Aberdeenshire ; Ben Nevis, Invernessshire ; Cor- 
raun Mt. and Achill Sound, Mayo. 
34. P. prolixa Carroll in Journ. Bot. iii. p. 288 (1865).— 
Thallus suborbicular, appressed, narrowly lobate, the lobes 
imbricate, crowded, convex and wrinkled, crenate, scarcely 
dilated at the apices, very dark-olive or blackish-umber, 
somewhat shining; beneath blackish, sparingly rhizinose all 
over (K=, CaCl-). Apothecia small or moderate in size, 
coloured like the thallus with an entire or subentire margin: 
spores 9-12 p long, 5-6 p» thick.—Cromb. in Grevillea x. p. 25 
(1881). P. dendritica Pers. in Ann. Wetter. Ges. ii. p. 16 
(1811)? P. olivacea var. proliva Ach. Meth. Lich. p. 214 (18053) ; 
Leight. Lich. Fl. p. 122; ed. 3, p. 115; var. dendritica 
Leight. 1. c. 
Exsicc. Leight. n. 365 (as P. stygia). 
i L 
