lOG LKCANO-LKCIDKKI [lECIDEA 



Hab. On rocks, trunks of old trees, chiefly firs, rarely on old 

 piilin{T;s or encrustin<^ mosses on boulders in hilly and mountainous 

 districts. — Distr. Not unconnuon in central and iM. J''nf,dand, plentiful 

 in Wales and the Highlands of Scotland ; apparently rare in E. and 

 S.W. Ireland. — B. M. Charnwood Forest, Leicestershire ; Hay Park, 

 Herefordshire ; Cromford Moor, near Matlock, and Black Edge, near 

 Buxton, Derbyshire ; Cader Idris and Nannau, near Dolgelly, 

 Merioneth ; Craigforda, Shropshire ; Ingleby Park, Cleveland, York- 

 shire ; Windermere, Westmoreland ; Hedgehope, Northumberland ; 

 Eoseneath, Dumbartonshire ; Inverary and Head of Loch Awe, 

 Argyll ; Glen Falloch, Killin, Ben Lawers, Black Wood of Kannoch, 

 Craig Vinean and Craig-y-Barns, Dunkeld, Perthshire ; Hill of Ardo, 

 near Aberdeen ; Craig Coinnoch, Morrone, Glen Quoich and near the 

 foot of Ben Macdhui, Aberdeenshire ; Glen Nevis and Rothiemurchus 

 Woods, Invernessshire ; Lairg, Sutherland ; Dublin Mts. ; Turk Mt., 

 Killarney, Kerry. 



Form microcarpa Nyl. Lich. Scand. p. 246, fig. 10 (1861). — 

 Thallus thin, granulose-subconcrescent. Apothecia small ; spores 

 0,058-72 mm. long, 0,024-30 mm. thick. 



Differs in the smaller apothecia and spores. In the single British 

 specimen, which is sparingly fertile, a few of the confluent apothecia 

 are erratic on the sterile thallus of Cladonia coccifera. 



Hah. Incrusting mosses on boulders in a subalpine locality. — 

 B. M. Craig Calliach, Perthshire. 



Var. /? affinis Nyl. in Mem. Soc. Cherb. v. p. 127 (1857).— 

 Thallus and apothecia as in the type ; medulla not coloured. — 

 Leigh t. Lich. Fl. ed. 3, p. 263. L, affinis Schser. Enum. p. 132 

 (1850); Cromb. in Journ. Bot. xii. p. 149 (1874). 



Nylander rightly considers this only a variety, the absence of 

 colour in the medulla being the only distinguishing character. 



Hah. On decayed mosses on the ground in an alpine locality. — 

 B. M. Morrone, Braemar, Aberdeenshire. 



Var. y mellna Nyl. in Ann. Sci. Nat. ser. 4, xix, p. 357 

 (1863). — Thallus thinnish, medulla colourless. AjDothecia small; 

 spores 2 in the ascus, 0,052-64 mm. long, 0,034-44 mm. thick. — 

 Cromb. in Journ, Bot. xii. p. 149 (1874); Leight. Lich. Fl. ed. 3, 

 p. 263. L. didymospora Stirton in Grevillea ii. p. 60 (1873). 

 Lichenoides tartareum tinctorium candidum, tuberculis atris Dill. 

 Hist. Muse. p. 128 t. 18, fig. 8 (1740) 3Iegalospora melina 

 Krempelh. ex Nyl. /. c. 



Closely related to the preceding, of which, but for the 2-spored 

 asci and the smaller spores, it might be regarded as only a form (see 

 Nyl. in Not. Siillsk. Faun. & Fl. Feun. n. ser. v. p. 166). 



Hab. On the trunks of firs in mountainous districts. — Distr. Very 

 local and rare in N. Wales and the S. Grampians, Scotland. — B. M. 

 Cader Idris, Merioneth ; Ben Lawers, Perthshire. 



202. L. fucata Stirton in Scott. Nat. 1879, p. 16.— Thallus 

 cinereous, granulose or evanescent. Apothecia black, round or 

 oblong, or somewhat irregular, convex and immarginate, internally 



