238 LICHENACET. [PARMELIA. 
mouth, Dolgelly, and near Harlech, Merionethshire ; Island of Anglesea ; 
Oswestry, Shropshire; near Kendal, Westmoreland. New Galloway, Kirk- 
cudbrightshird; Barcaldine, Argyleshire ; Loch Linnhe, Inverness-shire. 
Castlebernard Park, Bandon, co. Cork; Killarney, co. Kerry ; Letterfrack, 
Connemara, co. Galway. 
Var. 3. rugosa Cromb. Grevillea, xv. (1887) p. 75.—Thallus 
somewhat expanded, the lobes broadly linear at the circumference, 
more or less rugose. Apothecia with the thalline margin at length 
rigose; spores 0,013-15 mm. long, about 0,008 mm. thick. —Par- 
melia tiliacea var. rugosa Leight. Lich. Fl. p. 188. P. leevigata var. 
rugosa Leight. Lich. Fl. ed. 3, p. 128. Parmelia rugosa Tayl. in 
Mack. Fl. Hib. ii. (1836) p. 145. 
A well-marked variety, agreeing with the type in the reaction of the 
medulla, but differing in the rugose thallus and margin of the apothecia, 
and in the broader (Jess revolute) lobes, which are rarely and sparingly 
sorediiferous at the apices. The apothecia are very rare. 
Hab. On rocks in maritime districts —Distr. Local in S.W. England, 
N. Wales, the W. Highlands, Scotland, and 8.W. Ireland.—B. M.: Corn- 
worthy, Devonshire ; The Lizard, Cornwall; .Barmouth (fruit), Dolgelly, 
and Aberdovey, Merionethshire; Llanberis, Carnarvonshire. Barcaldine, 
Argyleshire. Dunkerron (fruit), co. Kerry. 
Form panniformis Cromb. Grevillea, xv. (1887) p. 75.—Thallus 
more or less rugose ; lacinie short, narrowly dissected and congested. 
Apothecia not seen. 
Forms a somewhat densely imbricate crust, from the short lacinie 
being much divided and aggregate. It occurs only sterile. 
Hab. On the trunks of old trees, near the base, in maritime and upland 
tracts.— Distr. Local and scarce, in 8.W. England and the W. Highlands, 
Scotland.—B. M.: Pentire, Cornwall. By Loch Linnhe, Inverness- 
shire. 
Var. y. concentrica Cromb. Grevillea, xv. (1887) p. 75.—Thallus 
panniform, free, spherical, growing in involved concentric layers. 
Apothecia not seen.— Parmelia tiliacea var. concentrica Leight. Lich. 
Fl. p. 183, ed.3, p. 122. Parmelia laevigata var. concentrica Cromb. 
Lich. Brit. p. 33. Parmelia sinuosa y. concentrica Mudd, Man. 
p. 96. Parmelia saxatilis var. concentrica Leight. in Garden. Chron. 
1856, pp. 84,172. Parmelia sinuosa var. erratica Linds. Mem. 
Sperm. p. 218.—Brit. Eas.: Leight. n. 232. 
This curious variety occurs on the ground in a free condition as small 
globular balls. There is no reason to suppose that it is free ab initio, but 
that, after being detached, it assumes this form from accidental circum- 
stances (cfr. Cromh, Journ. Bot. 1872, p. 307). Though it has been re- 
ferred to different species, the thalline reactions, in conjunction with the 
general aspect of the plant, show that it belongs to P. revoluta, produced 
no doubt by a panniform condition of this species. ‘ 
Hab. On the ground in maritime and upland tracts.—Dizstr. Extremely 
local and rare in 8.W. England.—B. M.: Melbury Hill, near Shaftes- 
bury, Dorsetshire. 
