98 LECANO-LECIDEEI [lECIDEA 



gelatine slightly bluish with iodine. — Cromb. in Grevillea v. 

 p. 28 ; Leight. lich. Fl. ed. 3, p. 276. Specimen not seen. 



Sobb. On rocks, overspreading Sirosiphon saxicola. — Distr. Ex- 

 tremely local and rare, known only from a single specimen (CJonnemara, 

 Galway). 



182. L. sylvicola Plot. Lich. Siles. n. 171 (1830); Nyl. 

 in Not. Sallsk Faun. & Fl. Fenn. n. ser. v. p. 185 (1866).— 

 Thallus effuse, thin, rimulose, wrinkled or somewhat f urfuraceous, 

 pale-tawny-yellow or dull-greyish (K — , CaCl — ). Apothecia small, 

 black, convex, unmarginate, sotoietimes becoming two or more 

 connate and tuberculate ; hypothecium thick, blackish-brown or 

 violet-black ; paraphyses concrete, the base and towards the tips 

 deep-greenish-blue or sometimes brownish, the whole hymenium 

 bluish; spores ellipsoid, smaU, 0,007-10 mm. long, 0,0035-45 mm. 

 thick ; hymenial gelatine wine-red with iodine. — Cromb. Lich. 

 Brit. p. 69 ; Leight. Lich. Fl. p. 256 ; ed. 3, p. 248. L. lutens 

 Tayl. in Mackay Fl. Hib. ii. p. 259. 



Exsicc. Larb. Lich. Hb. n. 304 ; Lich. Caesar, n. 84. 



In more exposed situations the thaUus is somewhat variable in 

 thickness and becomes darker in colour. The spermogones are wart- 

 like with slender straight spermatia, 0,004-5 mm. long, about 

 0,001 mm. thick. 



Hob. On shady rocks, granitic and schistose, in maritime and 

 upland situations. — Disfr. Bather local and scarce in the Channel 

 Islands, W. England, S.E. and W. Ireland; not yet seen from 

 Scotland.— JS. M. St. Peter's Valley, Jersey; Mouliu Bay, Sark; 

 Cobo Bay, Guernsey ; near Penzance, Cornwall ; Holly Bush Hill, 

 Malvern, Worcestershire ; Barmouth, Merioneth ; Battersby Bank, 

 Cleveland, Yorkshire ; the Dargle, Wicklow ; Kylemore, Connemara, 

 Galway. 



Var. infidula Cromb. Lich. Brit. p. 69 (1870). Very similar 

 to the type in external appearance, but with more pallid apothecia, 

 and the hypothecium pallid or almost colourless. — Leight. Lich. 

 Fl. p. 256; ed. 3, p. 248. L. aphana Nyl. in Flora 1. p. 327 

 (1867); Carroll in Joum. Bot. v. p. 256 (1867); Cromb. lich. 

 Brit. p. 84 ; Leight. Lich. Fl. p. 267 ; ed. 3, p. 265. L. infidula 

 Nyl. in Flora li. p. 278 (1868). L. hiulata Nyl. in Flora Ivi. 

 p. 297 (1873) ; Leight. Lich. Fl. ed. 3, p. 253. L. dilutiuscula 

 Nyl. in Flora lix. p. 308 (1876) & Lich. Env. Paris, p. 93 ; Leight. 

 lich. Fl. ed. 3, p. 254. 



Exsicc. Larb. Lich. Hb. n. 305. 



Differs from the type in the paler-coloured hypothecimn and in 

 the more pronounced blue colour of the hymenium. Original speci- 

 mens of L. lutulaia from the type locality have the hypothecium 

 pale, not brownish-black as described by Nylander. 



Sab. On schistose and granitic rocks in maritime and upland 

 districts. — Distr. Somewhat rare, though widely distributed, in the 

 Channel Islands, S. and N. England and TVales, not recorded from 

 Scotland. — B. M. Eoyal Manor Avenue and Bozel Meadow, Jersey ; 



