248 LICHENACEI. [PAKMELIA. 



of maceration. In the centre the lacinire are convex and subrugose. 

 The apothecia are numerous, chiefly central, becoming somewhat large 

 and flexuose. The spermogones are abundant, black, irregularly scattered 

 over the surface of the thallus, with sperrnatia 0,005-G mm. long, about 

 0,001 mm. thick. 



Hab. On old walls, rocks, and boulders in maritime and upland regions. 

 Distr. General and common in Great Britain, especially in mountainous 

 tracts ; rarer in the Channel Islands; apparently rare in Ireland.]'). M. : 

 Islands of Jersey and Sark. Dartmoor, Ivy Bridge, and Temple Moor, 

 Devonshire ; near Penzance and Helininton, Cornwall : Malvern Hills, 

 Worcestershire ; Charnwood Forest, Leicestershire ; near Oswestry, 

 Shropshire ; Llanbedr, Barmouth, Cader Idris, and Dolgelly, Merioneth- 

 shire ; Llandyssil, Cardiganshire ; Bangor, Carnarvonshire ; Beauuiaris, 

 Island of Angle>ea ; Teesdale, Durham ; near Kendal, Westmoreland ; 

 Ennerdale, Cumberland. New Galloway, Kirkcudbrightshire ; near Mof- 

 fat, Dumfriesshire ; Ayrshire ; Inverary, Criuan Canal, and Appin, 

 Argyleshire; Loch Ard, Ben Lawers, and Aberfeldy, Perthshire ; Durris, 

 Kincardineshire ; Craig Guie, Braemar, Aberdeenshire. Duukerron, co. 

 Kerry. 



Form isidiata Leight. Lich. Fl. i. (1871) p. 135. Thallus co- 

 vered "with densely crowded isidia, except at the circumference : 

 otherwise as in the type. Leight. Lich. Fl. ed. 3, p. 125. Iiitbri- 

 caria conspersa f. isidiata Anzi Cat. Lich. Sondr. (1860) p. 28. 

 Lichenoides imbricatum viridans, scuteUis badiis Dill. Muse. 180, 

 t. 24. f. 75 v.rit. Exs. : Leight. n. 79 pro parte ; Bohl. n. 110. 



Easily recognized by the densely isidioid thallus, in which the Iacinia3 

 are often scarcely visible. It is usually infertile, and when present the 

 apothecia are not numerous. 



Hah. On rocks and boulders in upland districts. Distr. Bather local 

 in S.W., W., and N. England, in Wales and S. Scotland, more frequent 

 in the S. and W. Highlands ; apparently rare in N.W. Ireland. B. M. : 

 Dartmoor, Devonshire ; Withiel and near Penzance, Cornwall ; Here- 

 fordshire Beacon, Malvern, Worcestershire ; Pont-nedd-Vechan, Breck- 

 nockshire ; near Dolgelly, Merionethshire ; Snowdon, Carnarvonshire ; 

 near Kondal, Westmoreland ; Ennerdale, Cumberland. New Galloway, 

 Kirkcudbrightshire ; Appin, Argyleshire ; King's Park, Stirling ; Ben 

 Lawers and Rarmoch, Perthshire ; near Cortachy, Forfarshire ; Crathes, 

 Aberdeenshire. 



Var. /3. stenophylla Acb. Meth. (1803) p. 206. Thallus some- 

 what effuse: lacinise longer, narrower, more divided and imbricate. 

 Apothecia smaller, rare. Mudd, Man. p. 102 ; Cromb. Lich. lirit. 

 p. 34 ; Leight. Lich. Fl. p. 135, ed. 3, p. 124. Brit. Exs. : Leight. 

 n. 79 pro parte. 



Well distinguished by the form of the lacinias. It occasionally pre- 

 sents an almost paunifoirn aspect, ar,d is normally glabrous, though some- 

 times sparingly isidiiferous. TLe apothecia are very rare in British 

 specimens. 



Hab. On boulders and old walls in upland districts. Distr. Local and 

 scarce in S., Central, ard AV. England, in N. Wales, in the S.W. High- 

 lands and S. Grampians, Scotland ; rare in S.W. Ireland. B. M. : Near 

 Penzance, Cornwall ; Bardon Hill, Leicestershire ; near Oswestry, Shrop- 



