174: LECANO-LECIDEKI [bUELLIA 



Lecidea saxorum Hepp Flecht. Eur. n. 752 (1867) ; Leight. lich. 

 ri. p. 302 ; ed. 3, p. 314. 



Differs from B. Uptocline in the very marked limiting hypothaUns ; 

 from jB. svibdisciformis in the reaction with potash. 



Sah. On rocks. — Distr. Bare in the Channel Islands and X. 

 England. 



19. B. excelsa A. L. Sm.^ — ThaUns white, thin, effuse, areolate- 

 cracked, the areolae plane and flat, somewhat shining, at times 

 scattered or almost obsolete (Ki + yellow, CaClf + yeUow). 

 Apothecia black or violet-black, small, innate, plane or somewhat 

 concave, margin thickish, prominent ; hypothecium blackish- 

 brown ; paraphyses indistinct, blackish-brown and thicker at the 

 apices ; spores dark-brown, oblong, 0,015 mm. long, 0,007 mm 

 thick. — Lecidea exceha Leight. in Grevillea iv. p. 78 (1876) i 

 Lich. Fl. ed. 3, p. 323. 



Hah. On mica-schist rocks. — B. M. Summit of the Doughmagh 

 ilt., Connemara, Gkdwaj-. 



20. B. leptocline Koerb. Syst. lich. Germ. p. 225 (1855) 

 (excl. svn. B. saxontm). — ^Thallus whitish or greyish-white, 

 warted- or cracked-areolate ; hypothallus indistinct. Apothecia 

 sessile or adnate, plane or l>e coming convex, the margin promi- 

 nent then excluded ; hvpothecimn blackish-brown ; paraphvses 

 coherent, dark-brown at the capitate tips ; spores ellipsoid, 

 blackish-brown, 0,012-16 mm. long, 0,006-9 mm. thick; hymenial 

 gelatine deep-blue with iodine. — Lecidea lepfodine Flot. in Bot. 

 Zeit. viiL p. 555 (1650). 



Tar. Mongeotii Th. Fr. Lich. Scand. p. 598 (1874).— ThaUus 

 whitish, granular-dispersed or evanescent. Apothecia prominent, 

 small, black, not pruinose : spores 0,011—16 mm. long, 0,006-8 

 mm. thick. — Lecidea Mmigeotii Hepp Flecht. Eur. n. 311 (1857). 

 L. h/popodioides Xjl. in Flora 1. p. 372 (1867). 



Hah. On rocks in mountaiaous regions. — B. M. Ciaig Tulloch, 

 Blair Athole, Perthshire. 



Tar. gevrensis Th. Fr. /. e. — Apothecia often angular and 

 crenat*, more or less covered with an seruginous, green powder, 

 the margin black, naked, otherwise as in the species. — Buellia 

 gerreim's Th. Fr. in Bot. Xot. 1865, p. 111. Lecidea gevrensis 

 Cromb. var. prolata Xvl. ex Cromb. in GreviUea i. p. 173 (1873). 

 Specimen not seen. 



Hob. On rocks. Found by Crombie on Gaim Gowar, Blair Athole, 

 Perthshire. 



21. B. leptoclinoides Steiner in Verb. K. K Zool.-Bot. Ges. 

 Wien Ivii. p. 357 (1907). — Thallus thin, greyish, cracked-areolate, 

 the areolae plane or slightly turgid (K + yellow, CaCl — ). Apo- 



