COCCOCARPIA.] LECANO-LECIDKE1. 347 



concentrically rugulose towards the circumference, is very rarely partly 

 panniform, and occasionally bears pale rhizinse on the under surface. The 

 apothecia are small in proportion to the size of the thallus, though some- 

 times moderate, occasionally having the appearance of being compound, 

 while rarely they are proliferous, with the margin crenate and inflexed. 



Hub. On the trunks of old trees, seldom on mossy boulders and walls, 

 in maritime and upland wooded regions. Distr. General and common, 

 especially in the mountainous tracts of Great Britain and Ireland ; scarce 

 in the Channel Islands. B. M. : La Coupe, Island of Jersey ; Islands of 

 Guernsey, Crevichou, and Alderney. Appnldurcombe, Isle of Wight ; 

 South Brent and Bolt, Head, Devonshire ; near Penzance, Bodmin, Pentire, 

 Bocconoc and Respring, Cornwall ; Cader Idris, and near Barmouth, 

 Merionethshire ; Aber, Carnarvonshire ; Bettws-y-Coed, Denbighshire ; 

 Eglestone, Durham ; Keswick and Ennerdale Lake, Cumberland. New 

 Galloway, Kirkcudbrightshire ; Barcaldine, Appin, and Head of Loch 

 Awe, Argyleshire ; Glen Falloch, Glen Lochay, and Killin, Perthshire ; 

 Clova, Forfarshire ; Craig Coinnoch, Braemar, Aberdeenshire ; S. of Fort 

 William, Inverness-shire; Applecross, Ross-shire. Cromaglown and 

 Blackwater Bridge, co. Kerry ; Connemara, co. Galway. 



Var. ft. myriocarpa NyL Lich. Scand. (1861) p. 128. Thallus 

 microphylline or granulose in the centre. Apothecia rather small, 

 numerous, often margined by the granulose thallus. Cromb. Lich. 

 Brit. p. 43. Pannuria plumbea ft. myriocarpa Mudd, Man. p. 122 ; 

 Leight. Lich. Fl. ed. 3, p. 154. Parmelia plumbea var. myriocarpa 

 Del. in Dub. Bot. Gall. (1830) p. 606. Brit. Exs. : Cromb. n. 57 ; 

 Larb. Caesar, n. 72 pro parte. 



Differs in the smaller, less developed thallus, which is frequently gra- 

 nulose almost throughout, and is thus analogous to var. of Pannaria 

 mbiffinoM. The apothecia are usually crowded, and in a young state are 

 often crowned by greyish thalline granules (form lecanoroidea Cromb. 

 Grevillea, xviii. p. 44). 



Hab. On the trunks of old trees in maritime and upland wooded re- 

 gions. Distr. Rather local in S.W. and N. England, N. Wales, the W. 

 Highlands, and N.E. Scotland ; rare in the Channel Islands and S. Ireland. 

 B. M. : Island of Jersey. Throwleigh, Totnes, and near Hopton, Devon- 

 shire ; near Penzance, Cornwall ; Bettws-y-Coed, Denbighshire ; Island 

 of Anglesea ; Teesdale, Durham ; Windermere, Westmoreland. Near 

 Campsie, Dumbartonshire ; Barcaldine, Argyleshire ; The Trossachs, 

 Aberfeldy, and Killin, Perthshire ; S. of Fort William, Inverness-shire ; 

 Cawdor Woods, Nairn. Deer Park, Castlebernard, co. Cork. 



Subtribe II. LECANOREI Nyl. Flora, 1882, p. 458. 



Thallus squamulose, granulose or pulverulent, internally contain- 

 ing gonidia. Apothecia typically lecanorine; spores 8nae, rarely 

 numerous, simple or variously divided ; paraphyses discrete. Sper- 

 mogones usually with jointed sterigrnata. 



Well distinguished from the preceding subtribe by the gonidial layer 

 consisting of eugonidia. _ It is very variable in the characters of the thallus 

 and fructification, sometimes, in the latter respect, passing as it were into 

 the subtribe of the Lecideci. 



