136 LECANO-LECIDEKI [bILIMBIA 



Apothecia sessile, aggregate, at first somewhat piano and thinly 

 margined, at length hemispherical and immarginate, blackish- 

 brown or black ; paraphyses concrete, bluish-green at the apices ; 

 hypothecium brownish-black ; spores ellipsoid or oblong-fusiform, 

 1-3-septate, 0,014-24 mm. long, 0,003-6 ram. thick ; hymenial 

 gelatine bluish then sordid-violet with iodine.- — Mudd Man. 

 p. 188. Lecidea sahidctoriim va.r. syncomista Floerke in Berl. Mag. 

 p. 310 (1808); f. sijncomista Cromb. Lich. Brit. p. 71 (1870). 

 L. milliaria var. syncomista Leight. Lich. Fl. p. 339 (1871); 

 ed. 3, p. 362. L. syncomista Cromb. in Grevillea i. p. 172 

 (1873). 



Exsicc. Larb. Cyesar. n. 82 & Lich. Hb. n. 315 ; Cromb. 

 n. 176. 



Hah. On sandy ground and on soil in crevices of rocks in mari- 

 time and upland tracts. — Distr. Local and scarce in England, 

 Wales, and the Channel Islands ; more frequent on the Grampians, 

 Scotland ; not seen from Ireland. — B. M. Quenvais, Jersey ; Thetford 

 Warren, Norfolk ; Black Dale, near Buxton, Derbyshire ; Cader Idris, 

 Merioneth ; Pentregaer, Oswestry, Shropshire ; Achosragan Hill, 

 Appin and I. of Lismore, Argyll ; Craig Calliach, Loch-na-gat, Ben 

 Lawers and Craig Tulloch, Perthshire ; Craig Guie and Morrone, 

 Braemar, Aberdeenshire. 



Var. perpailescens A. L. Sm. — Thallus squamulose, gi^eyish- 

 white, the squamules paler at the margins. Apothecia pale or 

 pale-brick-red. — Lecidea syncomista subsp. perpailescens Nyl. in 

 Flora Ixii. p. 361 (1879) ; Cromb. in Grevillea viii. p. 112. 



Differs from the type in the constantly paler thallus and apothecia. 



Hab. On the soil in crevices of calcareous rocks in a maritime 

 district. — B. M. I. of Lismore, Argyll. 



Var. montana A. L. Sm. — Thallus effuse, thin, greyish or 

 whitish, granulose. Apothecia aggregate, immarginate ; hypo- 

 thecium thick, black ; paraphyses dark-bluish-green or black ; 

 otherwise as in the tyipe.— Lecidea vernalis var. montana Nyl. in 

 Act. Soc. Linn. Bord. ser. 3, i. p. 354 (1856). L. sahuletorum 

 f. montana Nyl. Lich. Scand. p. 205 (1861); Cromb. Lich. Brit, 

 p. 71. L. milliaria var. montana Leight. Lich. Fl. p. 339 (1871) ; 

 ed. 3, p. 362 pro parte. 



Differs from the type in the thinner more finely granular thallus, 

 and the internally blacker apothecia. 



Hab. On the ground incrusting mosses. — Distr. Eare in alpine 

 situations. — B. M. Ben Lawers, Perthshire ; Ben-naboord, Aberdeen- 

 shire. 



7. B. squalida Jatta Syll. Lich. Ital. p. 403 (1900).— ThaUus 

 subde terminate, squamulose-concrescent, plicate- wrinkled, the 

 squamules sublobulate, often pulvinate, tawny, or greyish-brown 

 (K — , CaCl — ). . Apothecia small, adnate, plane and thinly 

 margined, then convex and immarginate, black ; hypothecium 



