biatokina] lecideace^ 119 



determined and named the plant L. Grijffithii in honour of the 

 collector. 



Hab. On smoothish bark of trees, rarely on naked trunks, in 

 upland, rarely maritime wooded tracts. — Distr. Not uncommon in 

 England, scarce in the S.W. Highlands of Scotland, S. Ireland, and 

 the Channel Islands. — B. M. St. Peter's Valley, Jersey ; Runton, 

 Norfolk ; Gosfield Hall, Quendon Wood and Epping Forest, Essex ; 

 Ightham, Kent ; St. Leonard's Forest, Sussex ; New Forest, Hants ; 

 Ullacombe, Bovey Tracey, Devon ; Oakley Park, Cirencester, and 

 Sapperton, Gloucestershire ; Twycross, Gopsall Park, Leicestershire ; 

 Malvern, Worcestershire ; Limekiln Wood, Wrekin and Haughmond 

 Hill, Shropshire ; near Harboro' Magna, Warwickshire ; Builth, 

 Brecknockshire ; Garn, Denbighshire ; Ludlow and Haughmond Hill, 

 Shropshire ; Airyholm Wood and near Ayton, Cleveland, Yorkshire ; 

 Teesdale, Durliam ; by Loch Lomond, Dumbartonshire ; Glen Falloch, 

 Perthshire ; Glenstale, Tipperary ; Deer Park, Castle Bernard, Cork. 



16. B. Bouteillei Arnold ex Syd. Flecht. Deutschl. p. 167 

 (1887). — Thallus effuse, thin, filmy, minutely granulose, pale- 

 greenish-white (K — , CaCl — ). Apothecia minute, adnate-sessile, 

 plane, yellowish-flesh-coloured, the margin thin, entire or crenate- 

 liexuose, paler ; hypothecium colourless ; paraphyses slender, 

 irregular ; spores ellipsoid, minute, 0,008-10 mm. long, 0,003-4 

 mm. thick ; hymenial gelatine bluish then sordid-yellow, the asci 

 persistently bluish at the apices, with iodine. — Parmelia Bou- 

 teillei Desmaz. in Ann. Sci. Nat. ser. 3, vii. p. 191 (1847). 

 Lecidea Bouteillei Nyl. in Not. Sallsk. Faun. & Fl. Fenn. n. 

 ser. V. p. 152 (1866); Cromb. in Journ. Bot. ix. p. 178 (1871); 

 Leight. Lich. Fl. p. 323 ; ed. 3, p. 343. 



Hab. On leaves of box and fir, and on elm bark. Distr. Rather 

 rare in the Channel Islands and S. England on leaves of box. — B. M. 

 Danny and Woolstonbury, Sussex. 



17. B. erysiboides Th. Fr. in Vet. Akad. Forh. 1864, p. 271. 

 — Thallus subeftuse, very thin, leprose, green or greenish, sub- 

 obsolete (K — , CaCl — ). Apothecia small, somewhat convex, 

 immarginate, oi)aque, brick-coloured, reddish or yellowish, con- 

 colorous within ; paraphyses coherent, colourless ; hypothecium 

 colourless ; spores shortly ovoid, 0,007-10 mm. long, 0,003-5 mm. 

 thick ; hymenial gelatine bluish then sordid-wine-red with iodine. 

 — Lecidea erysiboides Nyl. in Not. Sallsk. Faun. & FJ. Fenn. n. 

 ser. i. p. 232 (1858-9) ; Cromb. in Grevillea xxii. p. 11 & Lich. 

 Brit. p. 72 (excl. f. sordidescens) ; Leight. Lich. Fl. p. 323 ; 

 ed. 3, p. 343 (excl. same form). 



From its external aspect might readily be taken for a state of 

 Lecidea vernalis, but is definitely separated by the ovoid spores, 

 which are somewhat similPor to those of many Artlionice. The thallus, 

 usually scarcely visible, is often entirely obsolete. In moist situations 

 the apothecia are at times pale, convex, and several congregate 

 (i. pallida Nyl. ex Cromb. Lich. Brit. I. c). 



