238 LICHENACET. [PARMTU.TA. 



mouth, Dolgelly, and near Harlech, Merionethshire ; Island of .\nglesea ; 

 Oswestry, Shropshire ; near Keudal, Westmoreland. New Galloway, Kirk- 

 cudbrightshire ; Barcaldine, Argyleshire ; Loch Linnhe, Inverness-shire. 

 Castlebernard Park, Bandon, co. Cork ; Killarn^y, co. Kerry ; Letterfrack, 

 Connemara, co. Galway. 



Var. fl. 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 

 rugose: spores 0,013-15 mm. long, about 0,008 mm. thick. Par- 

 melia tiliacea var. rwyosa Leight. Lich. PL p. 133. P. la-vujata 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 tvpe in the reaction of the 

 medulla, but differing in the rugose thallus and margin of the apothecia, 

 and in the broader (less revolute) lobes, which are rarely and sparingly 

 sorediiferous at the apices. The apothecia are very rare. 



Hab. On rocks in maritime distiicts. Distr. Local in S.W. England, 

 N. Wales, the W. Highlands, Scotland, and S.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. (1837) p. 75. Thallus 

 more or less rugose ; laciniae short, narrowly dissected and congested. 

 Apothecia not seen. 



Forms a somewhat densely imbricate crust, from the short laciniae 

 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 S.W. England and the W. Highlands, 

 Scotland. B. M. : Pentire, Cornwall. By Loch Linnhe, Inverness- 

 shire. 



Var. j. 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. 133, ed. 3, p. 122. Parmelia Icpvigata 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. At'*. Exs. : 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. Cromb. Journ. Bot. 1872, p. 807). 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. recoluta, produced 

 no doubt by a panniform condition of this species. 



Hab. On the ground in maritime and upland tracts. Distr. Extremely 

 local and rare in S.W. England. B. M. : Melbury Hill, near Shaftes- 

 bury, Dorsetshire. 



