lecidea] lecideace^ 97 



conduent and then rather small, black ; hypothecium brown ; 

 paraphyses not well discrete, spores oblong, 0,010-13 mm. long, 

 0,0035-45 mm. thick ; hymenial gelatine pale-bluish then tawny- 

 wine-coloured with iodine. — Leight. in Ann. Mag. Nat. Hist, 

 ser. 3, xix. p. 332 (1867) & Lich. Fl. p. 282; ed. 3, p. 286; 

 Cromb. Lich. Brit. p. 92. Specimen not seen. 



Nylander places this near L. melanclieima Tuck, though in the 

 absence of the spermogones, its position is uncertain. 



Hah. On a mica-schist rock. — Distr. Ben Lawers, Perthshire. 



179. L. neglecta Nyl. in Not. Siillsk. Faun. & Fl. Fenn. 

 iv. p. 233 (1859) & Lich. Scand. p. 244.— Thallus sub- 

 determinate, thinly granulose, greyish-white or leaden-greyish, 

 the granules minute, subconfluent in patches (K-j- yellow, 

 CaCl — ). Apothecia minute, superficial, somewhat plane, black, 

 opaque, the margin obtuse, at length evanescent ; paraphyses 

 dark-brownish at the apices ; hypothecium brownish or dark ; 

 spores oblong or fusiform-oblong, 0,008-1 1 mm. long, 0,003-4 mm. 

 thick ; hymenial gelatine not tinged or only sordid-yellow with 

 iodine. — Cromb. in Journ. Bot. xiii. p. 141 (1875); Leight. Lich. 

 Fl. ed. 3, p. 276. 



Exsicc. Cromb. n. 189. 



A very distinct and rather peculiar species, which in a sterile 

 condition might readily be taken for a rudimentary condition of a 

 Stereocaulon. The thallus, normally orbicular, becomes, through the 

 confluence of several, more or less effuse. Apothecia rare. 



Hah. Incrusting mosses (Grimmias and Andreaeas) on boulders 

 in a subalpine district. — Dist7\ Local and scarce on the S. Grampians, 

 Scotland, and in N. England. — B. M. Ben Lawers, Perthshire. 



180. L. obsoleta Nyl. in Flora xlviii. p. 604 (1865).— Thallus 

 not visible. Apothecia minute, opaque, black, concolorous 

 within, the margin obtuse or indistinct ; paraphyses discrete, 

 the apices subclavate, thickened, nearly colourless ; hypothecium 

 sordid brownish ; spores oblong, sometimes obsoletely septate, 

 0,009-11 mm. long, 0,003 mm. thick ; hymenial gelatine scarcely 

 tinged with iodine. — Leight. in Ann. Mag. Nat. Hist. ser. 3, 

 xvii. p. 350 (1866) & Lich. Fl. p. 299; ed. 3, p. 309; Cromb. 

 Lich. Brit., p. 92. Specimen not seen. 



Differs from the preceding in the absence of a proper thallus and 

 in the character of the paraphyses. 



Hah. On cretaceous soil in an upland situation. — Distr. The 

 Downs, near Lewes, Sussex. 



181. L. pedatula Nyl. in Flora lix. p. 236 (1876).— Thallus 

 effuse, thin, granulose, whitish (K + yellow). Apothecia minute, 

 somewhat convex, stipitate, immarginate, black ; hymenium 

 in thin section bluish, the epithecium darker ; hypothecium 

 stipitiform, reddish ; spores not seen fully developed ; hymenial 



II. H 



