244 LICHENACEI. [PARMELI1A. 
Coinnoch, Morrone, Glen Dee, Braemar ; near Aviemore, and Ben Nevis, 
Inverness-shire ; Applecross, Ross-shire. Dunkerron and Caher, co. 
Kerry. 
Form cesio-pruinosa Nyl. ez Stiz. St. Gall. Nat. Ges. (1876) 
p. 206.—Thallus and the thalline margin of the apothecia cesio- 
pruinose.—Cromb. Journ. Bot. 1882, p. 272.—subsp. Parmelia 
omphalodes f. ceestopruinosa Nyl. ew Norrl. Not. Sallsk. pro F. et 
Fi. Fenn. Forh. xiii. (1873) p. 324. ; 
This differs merely in the presence of the cesiovs pruina, which, 
however, at length becomes more or less obsolete, and the thallus is 
sometimes of a bluish tint. The few British specimens yet seen are 
sterile. 
Hab. On rocks in alpine situations.—Dist7. Found only on two of the 
8. Grampians, Scotland—B. M.: Summits of Craig Calliach and Ben 
Lawers, Perthshire, 
Var. 3. panniformis Ach. Meth. (1803) p. 204 pro parte.—Thallus 
more or less effuse, the lacinie much narrower, shortly dissected 
and imbricate. Apothecia small or submoderate.—Nyl. ea Stiz. St. 
Gall. Nat. Ges. (1876) p. 206; Cromb. Grevillea, xv. p. 73.—Par- 
melia saxatilis var. panniformis Cromb. Lich. Brit. p. 34; Leight. 
Lich. Fl. p. 139, ed. 3, p. 128. 
Forms a densely imbricate and congested crust which is somewhat 
effuse. It is usually less shining than the type. The apothecia are 
occasionally present, but are not numerous, 
Hab. On rocks and boulders in upland and subalpine regions.— Distr. 
Not general, though plentiful in S.W. and W. England, N. Wales, S. 
Scotland, and on the Grampians.—B. M.: Hay Tor, Dartmoor, and Did- 
worthy, Devonshire; near Penzance and Helminton, Cornwall; Llyn 
Gwrionydd, Merionethshire. Stiperstones Hill, Shropshire. New Gal- 
loway, Kirkcudbrightshire ; Ben Cruachan, Argyleshire; Ben More, Ben 
Lawers, and Rannoch, Perthshire; Canlochan, Forfarshire; Morrone and 
Ben-naboord, Braemar, Aberdeenshire ; Ben Nevis, Inverness-shire. 
Form 1. glomulifera Cromb. Journ. Bot. 1872, p. 307.—Thal- 
lus with scattered, isidioid, nodulose, dark-brown or blackish 
glomeruli.—Leight. Lich. Fl. ed. 3, p. 126. 
Only var. panniformis with a few glomeruli, subsimilar in appearance, 
though differing in structure, to those of Ricasolia amplissima. These 
abnormal growths are probably peculiar to sterile states of the plant. 
Hab. On boulders in subalpine tracts.—Dist. Rare and local on the 
mts. of N. Wales and the Scottish Grampians—B. M.: Cym Idwal, 
Carnarvon. Morrone, Braemar, Aberdeenshire. 
Form 2. subconcentrica Cromb. Journ. Bot. 1872, p. 306.— 
Thallus panniform, subspherical, growing involved in concentric 
layers.— Leight. Lich. FI. ed. p. 128. 
A peculiar state analogous to P. revoluta var. concentrica, though the 
few specimens gathered were not so globular. As observed in Journ. 
