ibcidba] lecidbacb^ 95 



then sordid-violet with iodine. — L. intumescens Nyl. in Act. Soo. 

 Linn. Bord. ser. 3, i. p. 373 (1856) ; Mudd Man. p. 205, t. 3, 

 f. 76 ; Cromb. Lich. Brit. p. 85 ; Leight. Lich. PI. p. 254 ; ed. 3, 

 p. 246. L. hadia var. 13 intumescens Flot. Lich. Siles. n. 175 

 (1830). 



Exsice. Leight. n. 161 ; Mudd n. 174. 



Distinguished by the manner and place of growth. With us it 

 always forms small, orbicular, insulated patches on the thallus of 

 Lecanora glaucoma, usually limited by the hypothallus. As noted by 

 Mudd, though not strictly a parasite, it at length destroys the thallus 

 of the plant upon which it germioates. In the specimens seen the 

 apothecia are numerous and crowded. 



Hah. On rocks in maritime and upland hilly districts. — Distr. 

 Only here and there sparingly in Great Britain ; not seen from Ireland 

 or the Channel Islands. — B. M. Malvern Hills, Worcestershire ; 

 Gimlet Eock, Pwllheli, and Snowdon, Carnarvonshire ; Caer Caradoc, 

 Shropshire ; Lounsdale and Cliffrigg, Cleveland, Yorkshire ; near Port- 

 lethen, Kincardineshire. 



173. L. confusula Nyl. in Flora ly. p. 360 (1872).— Thallus 

 indeterminate, thinnish, granulate or granulate-conglomerate, the 

 glomerules thin, scattered, olive-grey or greyish- brown (K— , 

 CaCl — ). Apothecia small, adnate, convex, immarginate, black, 

 whitish within ; hypotheoium colourless ; paraphyses concrete ; 

 epithecium yellowish-brown (K — ) ; spores ellipsoid, 0,007- 

 0,011 mm. long, 0,004-5 mm. thick ; hymenial gelatine deep- 

 blue then wine-red with iodine. — Cromb. in Grevillea 1. p. 61 ; 

 Leight. Lich. Fl. ed. 3, p. 266. 



Hah. On micaceous rocks or on walls. — B. M. Craig Tullooh, 

 Blair Athole, Perthshire (the only locality). 



174. L. nigrificans Nyl. in Flora lix. p. 307 (1876).— Thallus 

 effuse, thin, rugulose, areolate-rimose, opaque, blackish, internally 

 green (K — )• Apothecia small, subprominent^ plane, slightly 

 margined, black, the margin at times bluish-grey, suffused ; 

 bypothecium colourless ; paraphyses distinct, moderate ; epithe- 

 lium blackish-blue-green; spores ellipsoid, 0,011-12 mm. long, 

 0,006-7 mm. thick ; hymenial gelatine wine-red with iodine. — 

 €romb. in Grevillea v. p. 27 ; Leight. Lich. FL ed. 3, p. 292. 



Distinguished from the preceding by the colours of the thallus and 

 the occasionally suffused margins of the apothecia, which in the 

 specimen seen are subminute and numerous. 



Hah. On a schistose rock in a maritime district. — B. M. Killery 

 Bay, Connemara, Galway (the only locality). 



175. L. leiotea Nyl. in Flora 1. p. 328 (1867).— Thallus 

 determinate, thin, continuous, smooth, obsoletely rimulose, shiny- 

 brown or greyish-black. Apothecia submoderate, adnate, plane, 

 margined, black, the margin obtuse or indistinct ; hypotheoium 

 colourless; paraphyses moderate, thicker and brownish at the 



