146 LECANO-LECIDEEI [bILIMBIA 



greyish or brownish-black (K — , CaCl — ), often evanescent. 

 Apothecia small, convex, immarginate, black ; paraphyses con- 

 crete, violet- or bluish-black at the apices ; hypothecium thick, 

 brownish-red or purplish-black ; spores linear-oblong, 3-septate, 

 0,014-22 mm. long, 0,004-6 mm. thick ; hy menial gelatine bluish 

 then dark-violet with iodine. — B. milliaria var. 8 melaena Mudd 

 Man. p. 188 (1861). Lccidea melsena Nyl. in Bot. Not. 1853, 

 p. 182; Carroll in Journ. Bot. v. p. 256 (1867); Cromb. Lich. 

 Brit. p. 71 ; Leight. Lich. El. p. 329 ; ed. 3, p. 353. 

 ExsicG. Mudd n. 159; Johns, n. 376. 



Readily distinguished by the very dark thallus and apothecia. 



Hab. On turfy ground, oocasionally on dead wood, in upland dis- 

 tricts. — Distr. Apparently very local in England, Wales and Ireland ; 

 common on the Grampians, Scotland ; not seen from the Channel 

 Islands. — B. M. Near Lyndhurst, New Forest, Hants ; Dartmoor, 

 Devon ; Cader Idris, Merioneth ; Ingleby Moor, Cleveland, Yorkshire ; 

 Eskdale, Cumberland ; Achosragan Hill, Appin, Argyll ; Ben Lawers, 

 Rannoch, and at base of Ben-y-Gloe, Perthshire ; Upper Glen Dee, 

 Braemar, Aberdeenshire ; Howth, Dublin ; Croghan, Killarney, Kerry. 



23. B. leucoblephara Arnold in Flora Ixvii. p. 574 (1884). — 

 Thallus determinate or subeffuse, thin, opaque, greyish- or 

 greyish-green (K + yellow, CaCl — ). Apothecia small, plane, 

 margined, brownish-black or black, blackish within, the margin 

 white ; paraphyses concrete ; hypothecium brownish-black ; spores 

 fusiform-oblong, 3-septate, colourless, 0,010-19 mm. long, 0,004-6 

 mm. thick ; hymenial gelatine bluish then violet-coloured with 

 iodine. — Lecidea leucoblephara Nyl. in Ann. Sci. Nat. ser. 4, 

 xix. p. 338 (1863); Leight. Lich. Fl. ed. 3, p. 351 ; Cromb. in 

 Grevillea xxii. p. 57. 



Exsicc. Larb. Lich. Hb. without number. 



Easily recognized by the white pubescent margins of the apothecia. 



Hab. On rocks (found on the Continent on furze, heather, etc.). — 

 jB. M. Near Kylemore, Connemara, Galway. 



24. B. rhexoblephara A. L. Sm. — Thallus effuse, thin, greyish 

 or dirty-white (K — , CaCl — ), often little visible. Apothecia 

 rather small, Vjlack, urceolate, then plane, with a thickish 

 prominent deeply-crenate margin ; hypothecium thick, black, 

 dark-brown in thin section ; hymenium whitish ; paraphyses 

 brown, somewhat thick and septate at the apices ; spores oblong- 

 or fusiform-ellipsoid, 3-septate, 0,017-21 mm. long, 0,006-7 mm. 

 thick ; hymenial gelatine pale-bluish with iodine. — Lecidea 

 rhexoblephara Nyl. in Mem. Soc. Cherb. v. p. 337 (1857) & 

 in Ofvers. K. Yet. Akad. Forh. 1860, p. 297 ; Carroll in Journ. 

 Bot. iii. p. 290 (1865) ; Cromb. Lich. Brit. p. 89 ; Leight. Lich. 

 Fl. p. 333 ; ed. 3, p. 355. 



Distinguished by the peculiar coronate margin of the apothecia 

 on account of which it was separated by Th. Fries as a new genus, 



