174 LKCANO-LKCIDEKl | BUELLIA 



Lecklea saxoriim Hepp Fleclit. Eur. n. 752 (1867) ; Leight. Licli. 

 Fl. p. 302 ; (h1. ?>, p. 314. 



Differs from B. leptocline in the very marked limiting hypothallus ; 

 from B. snhdisciformis in the reaction with potash. 



Hah. On rocks. — Distr. Rare in tlie Channel Islands and N. 

 England. 



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

 cracked, the areola; plane and jflat, somewhat shining, at times 

 scattered or almost obsolete (Kf + yellow, CaClf -j- yellow). 

 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, 0,007mm. 

 thick. — Lecidea excelsa Leight. in Grevillea iv. p. 78 (1876) & 

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



Hab. On mica-schist rocks. — B. M. Summit of the Doughruagh 

 Mt., Connemara, Gal way. 



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

 (excl. syn. B. saxorura). —ThaWus whitish or greyish- white, 

 warted- or cracked-areolate ; hypothallus indistinct. Apothecia 

 sessile or adnate, plane or becoming convex, the margin promi- 

 nent then excluded ; hypothecium blackish-brown ; paraphyses 

 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 leptocline Flot. in Bot. 

 Zeit. viii. p. 555 (1850). 



Yar. Mougeotii Th. Fr. Lich. Scand. p. 598 (1874).— Thallus 

 whitish, granular-dispersed or evanescent. Apothecia prominent, 

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

 mm. thick. — Lecidea Mougeotii Hepp Fleclit. Eur. n. 311 (1857). 

 L. hypopodioides Nyl. in Flora 1. p. 372 (1867). 



Hah. On rocks in mountainous regions. — B. M. Craig TuUoch, 

 Blair Athole, Perthshire. 



Var. gevrensis Th. Fr. I. c. — Apothecia often angular and 

 crenate, more or less covered with an seruginous, green powder, 

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

 gevrensis Th. Fr. in Bot. Not. 1865, p. 111. Lecidea gevrensis 

 Cromb. var. prolata Nyl. ex Cromb. in Grevillea i. p. 173 (1873). 

 Specimen not seen. 



Hab. On rocks. Found by Crombie on Cairn 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- 



