LECIDEa] LECIDBACEiE 31 



burgh ; Appin, Argyll ; Craig Calliach, Ben Lawers and Kannoch 

 Moor, Perthshire ; Hill of Ardo, Kincardineshire ; Morrone, Braemar, 

 Aberdeenshire ; Ben Nevis, Invernessshire ; near Lairg, Sutherland- 

 shire ; Hills of Applecross, Eoss-shire ; Cork. 



Yar. (3 humosa Ach. Meth. p. 43 (1803).— Thallus very thin, 

 leprose-granulose, the granules somewhat scattered, brownish- 

 black. Apothecia subminute, at length convex, brownish-black 

 or black ; otherwise as in the type. — Cromb. Lich. Brit. p. 343 ; 

 Leight. Lich. Fl. p. 275 ; ed. 3, p. 275 pro minima parte. L. 

 humosa Leight. Lich. Fl. ed. 3, p. 277 (1879). Lichen humoms^ 

 Ehrh. PI. Crypt. Exs. n. 135 (1789) pro parte. 



ExsicG. Larb. Lich. Hb. n. 308. 



Differs in the colour of the thallus, which is at times almost 

 evanescent, and in the darker more constantly convex apothecia, 

 which are at length crowded and aggregate. In shady situations, when 

 saxicolous, the tha,llus is more or less greenish. Intermediate between 

 the type and the following species. 



Hah. On the ground and on turf walls, rarely on shady rocks, in 

 maritime and upland districts. — Distr. Here and there in Great 

 Britain ; rare in the Channel Islands, and in N.W. Ireland ; no doubt 

 often overlooked. — B. M. Near the Coupee, Island of Sark ; New 

 Forest and near Bournemouth, Hants ; Leith Hill, Surrey ; Dolgelly 

 and Cader Idris, Merioneth ; Ben Lawers and Eannoch, Perthshire ; 

 Hill of Ardo, near Aberdeen ; Lough Inagh, Connemara, Galway (saxi- 

 colous) . 



34. L. fuliginea Ach. Syn. p. 35 (1814); Nyl. in Flora 

 Ixii. p. 206 (1879). — Thallus effuse, minutely granulose, brownish 

 black or fuliginous, the granules globose, crowded, subscabrid 

 (K — , CaCl — ). Apothecia small, plane, marginate, the margin 

 thin, entire, at length convex and immarginate, reddish or dark- 

 brown ; paraphyses indistinct, brownish ; hypothecium yellowish- 

 brown ; spores ellipsoid, 0,008-15 mm. long, 0,004-7 mm. thick ; 

 hymenial gelatine faintly bluish, then tawny- wine-coloured with 

 iodine. — Cromb. in Grevillea xxii. p. 9. L. uliginosa var. ^ full- 

 ginea Mudd Man. p. 198 (1861); iorm fuliginea Leight. Lich. 

 Fl. p. 274 (1871); ed. 3, p. 274. 



Exsicc. Larb. Lich. Hb. n, 226. 



Usually regarded as being only a lignicolous condition or a form 

 of the preceding species, to which it is intimately related. It is,- 

 however, distinct in the generally smaller spores, and especially, as 

 pointed out by Nylander, in the gonidia chiefly constituting syngo- 

 nidia. As noticed by Acharius, the thallus very speedily imbibes 

 water as if subgelatinous. In more shady and damp situations the 

 plant is always sterile. 



Hah. On old palings and dead wood in upland situations. — Distr. 

 Here and there throughout Great Britain, and plentiful where it occurs ; 

 very rare in the Channel Islands; not seen from Ireland. — B. M. 

 Island of Sark; Tuddenham, Suffolk; Epping Forest and Langford, 

 Essex ; Westwood Common, Surrey ; near Penshurst, Kent ; New 



