lecidea] lecideaob* 39 



mm. thick ; hymenial gelatine bluish then violet with iodine. — 

 Cromb. in Grevillea vi. p. 19 ; Leight. Lich. Fl. ed. 3, p. 267. 



Perhaps only a subspecies ; differs chiefly in the constantly larger 

 spores ; the substratum on which it grows is also different. The 

 single small specimen seen is well fertile. 



Hab. On wet shady rooks in a mountainous region. — B. M. Lough 

 Inagh, Connemara, Galway (the only locality). 



48. L. fuscorubens Nyl. ex Salw. in Trans. Edin. Bot. Soq. vii. 

 p. 551 (1863). — Thallus effuse, very thin, smooth, subcontinuous, 

 sordid-greyish (K— , CaOl— ) ; usually obsolete. Apothecia small, 

 sessile, plane, marginate, then convex and immarginate, brownish- 

 black or black, within brown ; hypothecium thick, brown ; 

 epithecium pale-reddish ; spores ellipsoid, 0,010-14 mm. long, 

 0,005-9 mm. thick ; hymenial gelatine bluish then wine-red with 

 iodine. — Cromb. Lich. Brit. p. 68 pro parte ; Leight. Lich. Fl. 

 p. 300 pro parte ; ed. 3, p. 310. Biatora fuscorubens Nyl. in Bot. 

 Not. 1853, p. 183 pro parte. 



A plant apparently little understood by authors. It is perhaps 

 only a variety or subspecies of L. sanguineoatra (cf . Nyl. Lich. Env. 

 Paris, p. 79), differing chiefly in the frequent absence of a thallus and 

 in the nature of the habitat. The somewhat scattered apothecia are 

 darker in more exposed situations. 



Hah. On calcareous rocks in mountainous districts. — Distr. Ex- 

 tremely local and scarce in the S. Grampians, Scotland, and in S.W. 

 Ireland. — B. M. Craig TuUoch, Blair Athole, Perthshire ; Doughruagh 

 Mt., Connemara, Galway. 



49. L. albohyalina Nyl. in Flora lix. p. 577 (1876).— Thallus 

 effuse, very thin, leprose, sordid- whitish (K — , CaCl — ), often 

 obsolete. Apothecia minute, convex or subglobose, whitish or 

 whitish-flesh-coloured ; hypothecium and paraphyses colourless ; 

 spores oblong or fusiform-oblong, simple or often 1 -septate, 0,008- 

 0,014 mm. long, 0,0025-30 mm. thick ; hymenial gelatine slightly 

 bluish then tawny-wine-red with iodine. — L. luteola var. albo- 

 hyalina Nyl. Herb. Mus. Fenn. p. 89 (1859). L. anomala var. 

 albohyalina Nyl. Lich. Scand. p. 203 (1861). 



Nylander says that the plant widely differs from L. meioaa/r>pa, 

 with which it is confused by Th. Fries (Lich. Soaud. p. 431). In 

 the very few British speounens seen, the thallus is inconspicuous, 

 and the apothecia, which are somewhat scattered, become darker 

 in age. 



Hab. On smooth bark and decorticated trunks of trees in wooded 

 upland tracts of mountainous districts. — Distr. Very local and scarce 

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

 Merioneth ; Craig Calliach, Perthshire. 



50. L. immersa Ach. Meth. p. 34 (1803). — Thallus effuse, 

 very thin, leprose, white or greyish-white, often obsolete (K — , 

 CaCl — ). Apothecia submoderate, immersed in depressions or 



