LECIDEA] LECIDEACEiE 37 



apothecia. In the single British specimen the apothecia are somewhat 

 scattered. 



Hob. On a decorticated fir tree in a mountainous region. — B. M. 

 Glen Derry, Braemar, Aberdeenshire (the only locality). 



45. L. sanguineoatra Ach. Meth. p. 50 (1803) pro parte; 

 Nyl. Lich. Par. Exs. n. 52 (1855). — Thallus effuse, thin, granulose 

 or subcontinuous, greyish or greenish-grey (K — , CaCl — ), at 

 times subobsolete. Apothecia moderate, at first plane and 

 thinly margined, soon becoming convex and immarginate, san- 

 guineous-black or brownish-black, within brownish-black (the 

 hymenium paler) ; paraphyses deep yellow or brownish towards 

 the apices ; hypothecium thick, brown or dark-red ; spores ellipsoid 

 or oblong, 0,010-19 mm. long, 0,005-8 mm. thick; hymenial 

 gelatine bluish then wine-red or violet with iodine. — Mudd Man. 

 p. 198 ; Cromb. Lich. Brit. p. 67 ; Leight. Lich. Fl. p. 268 ; ed. 3, 

 p. 267 pro parte. Lichen sanguineoater Wulfen in Jacq. Coll. iii. 

 p. 117 (1789)? 



A marked feature is, as stated by Th. Fries (Lich. Scand. p. 436), 

 the presence of bluish or violet-coloured granules among the para- 

 physes. The apothecia are often crowded and at times subconfluent. 



Hab. Incrusting mosses on rocks and boulders, rarely on dead 

 wood, in mountainous regions. — Distr. Only here and there in N. 

 England (Cleveland, Yorkshire), N. Wales, and on the Grampians, 

 Scotland ; and in S. Ireland. — B. M. Nannau, Dolgelly, Merioneth ; 

 Achosragan Hill, Appin, Argyll ; Glen Falloch and Ben Lawers, 

 Perthshire ; Canlochan, Forfarshire ; Morrone, Braemar, Aberdeen- 

 shire ; Glen Nevis, Invernessshire ; Bantry, Cork. 



Subsp. atrofusca Nyl. ex Wainio in Medd. Soc. Faun. & Fl. 

 Fenn. iii. p. 110 (1878). — Thallus as in the type. Apothecia 

 small, plane, margined ; the margin at times slightly flexuose, at 

 length somewhat convex and subimmarginate, brownish-black or 

 black ; hypothecium brownish or brownish-black ; spores oblong, 

 0,010-14 mm. long, 0,005-6 mm. thick. — Cromb. in Grevillea 

 xxii. p. 10. L. atrofusca Mudd Man. p. 198 (1861) ; Leight. 

 Lich. Fl. ed. 3, p. 259. Biatora atrofusca Flot. in Hepp Exs. 

 n. 268 (1857). Lecidea fusca Cromb. Lich. Brit. p. 68 (1870) 

 (non Schser.) ; Leight. Lich. Fl. p. 268 ; ed. 3, p. 267. 



Exsicc. Dicks. Hort. Sice. n. 99 (as Lichen muscorum Linn. 



fii.). 



Differs in the planer smaller and darker apothecia, as also in the 

 rather smaller spores. When growing at high elevations the thallus 

 is darker, almost blackish, and but sparingly fertile. The spores are 

 occasionally spuriously 1 -septate. 



Hah. On mossy rocks and mossy trunks of old trees in hilly and 

 mountainous regions. — Distr. Local and scarce in Central England, 

 N. Wales, the Highlands of Scotland, and W. Ireland. — B. M. Matlock, 

 Derbyshire ; Dolgelly, Merioneth ; Barcaldine, Argyll ; S. of Loch 

 Tay and Ben Lawers, Perthshire ; Morrone, Braemar, Aberdeenshire ; 

 near Kylemore, Connemara, Gal way. 



