242 LICHEIfACEI. [PARMELTA. 



General and common in tlie mountainous tracts of Great Britain, espe- 

 cially in the Scottish Hi3:hlands; apparently rare in S. and W. Ireland 

 and in the Channel Islands. — B. M.: Island of Alderney. Eridjre Rocks 

 and Ardinarley, Sussex ; Xew Forest, Hampshire ; near South Brent, 

 Devon ; near Penzance and Helminton, Cornwall ; Saveriiake Forest, 

 Wiltshire ; Charnwood Forest, Leicestershire ; Malvern, Worcestershire ; 

 Black Edge, Buxton, Derbyshire ; "Wrekin Hill, Shropshire ; Lambeth, 

 S. "Wales ; Barmouth and near Dolgelly, Merionethshire ; Cleveland, 

 Yorkshire; Kentraere, "Westmoreland; Keswick, Cuinberland. Dal- 

 malioy Crags, near Edinburgh ; near Helensburgh, Dumbartonshire ; 

 Appin, Argyleshire ; Ben Lawers and near Dunkeld, Perthshire ; Clova 

 and Cortachy, Forfarshire ; Crathes, Aberdeenshire ; Glen Callater, Mor- 

 roue, and Ben Avon, Braemar, Aberdeenshire ; Glen Xevis, luveroess- 

 shire. Lamhay Island, near Dublin ; near Cork ; DunkeiTon, co. Kerry ; 

 Kylemore, co. Galway- 



11. P. sulcata Tayl. in Mack. Fl. Hib. ii. (1836) p. 145.— 

 Thallus orbiculari-expanded, membranaceous, smoothish, not isidii- 

 ferous, irregularly imbricate, reticulato-sorediate, greyish or glau- 

 cous-Avbite, the soredia sulciform, rotundato-oblong or linear, mar- 



gined, whitish (K+fJlr;t,, ,!,,,,.,,_ CaClI). Apothecia and 



spores as in the preceding species. — Cromb. Grevillea, xv. p. 75. — 

 Parmelia saxatilis var. sulcata Cromb. Lieh. Brit. p. 34 ; Leight. 

 Lich. Fl. p. 138, ed. 3, p. 126. Parmelia sa.vatiUs ft. lencochroa 

 ( Wallr.) Mudd, Man. p. 94. Lichenoides vulrjatissimum dnereo- 

 (/lauciim, lacunosum et cirrlwsum Dill. Muse. 188, t. 24. f. 83 B. — 

 —BriL Exs. : Leight. n. 203 ; Mudd, n. 66 ; Cromb. n. 28. 



Distinguished from P. saxatilis by the soredia and the absence of isidia. 

 The thallus often spreads extensively and varies in the breadth of the 

 lacinife ; short and broad states are iorra ronceformis K(A\. (Lich. Univ. 

 p. 470). The apothecia are moderate, and sometimes have rather smaller 

 spores than in the preceding species. They are comparatively rare in 

 Britain as elsewhere, nor are the spermogones frequent in our specimens. 



Hab. On trees and old walls, chiefly in maritime and upland districts. — 

 — Distr. General and usually plentiful in Great Britain and Ireland ; rare 

 in the Channel Islands ; fertile chiefly in the Highlaods of Scotland. — 

 B. M. : Island of Guernsey. Eppiug and Ilainault Forests, Essex ; New 

 Forest, Hants ; Penzance and AVithiel, Corawall ; near Cirencester and 

 Sapperton, (Gloucestershire ; Darley, Derbyshire ; Grimsbury Green, 

 Northamptonshire ; Ludlow, Shropshire ; Ilarboro' Magua, "\Varwick- 

 shire : near Ilopton, Cheshire ; (Cleveland, Yorkshire ; Kendal, "West- 

 moreland ; near Hexham, Northumberland. Dairy, Kirkcudbrightshire ; 

 I'reghorn and Craig Luc-hart, near Edinburgh; Barcaldiue, Argyleshire; 

 Loch Katrine and KilHn, Perthshire ; Den of Murtle, near Aberdeen ; 

 S. of Fort William, Inverness-shire ; Applecross, Ross-shire. Rostellan, 

 CO. Cork ; Dunkerrcn, co. Kerry. 



Yar. ft. laevis Nyl. Syn. i. (1860) p. 389.— Thallus smooth, eso- 

 rediate, glaucous- or greyish-wliite ; beneath black, den.sely rhizinco- 

 fibrillose ; laciniiB narrow, more divided and discrete, greyish or 

 brownish at the apices. Apothecia not seen.— Cromb. Journ. Bot. 

 1875, p. 140. 



