102 LECANO-LECIDEKI [lECIDEA 



eitlicr crowded and ^•al•iollsly ano;iilose or thin granulose and scat- 

 tered, while at times it is subevanescent. The single British specimen 

 is well fertile, tliough the thallus is for the most part but little 

 developed. The spermogones are large, black, subglobose and vari- 

 ously corrugate, with spermatia shortly cylindrical, about 0,003 mm. 

 long. 



Hah. On the stump of an old fir tree in a wooded mountainous 

 region. — B. M. Ballochbuie Forest, Braemar, Aberdeenshire. 



190. L. pycnocarpa Koerb. Parerg. Lich. p. 213 (1861). — 

 Thallus warted or warted-areolate whitish or dark -ashy-grey ; 

 hypothallus indistinct (K -|- yellow, CaCl — ). Apotheeia minute, 

 black, somewhat convex, immarginate, conglomerate in dense 

 orbicular groups; hypothecium dark-brown; paraphyses coherent, 

 dark-brown towards the apices; spores linear-oblong 0,012-17 mm. 

 long, 0,003-6 mm. thick ; hymenial gelatine and asci blue then 

 wine-red with iodine. — L. sympliorella Nyl. in Flora Ixiii, p. 35 

 (1870) ; Cromb. in Journ. Bot. viii. p. 98 (1870) ; Leight. Lich. 

 Fl. p. 301 ; ed. 3, p. 286. L. amphotera Leight. ex Cromb. in 

 Journ. Bot. ix. p. 179 (1871) & Lich. Fl. p. 183 ; ed. 3, p. 287. 



Hab. On granitic and sandstone rocks. — Distr. Rare in moun- 

 tainous places, N. Scotland. — B. M. Ben Lawers, Craig Tulloch, 

 Ben-y-Gloe, Blair Athole, Perthshire ; Morrone, Braemar and Hill of 

 Ardo, Aberdeenshire. 



191. L. assimilis Th. Fr. Lich. Scand. p. 556 (1874).— Thallus 

 rather thin, areolate-warted or conglomerate, brownish-fawn- 

 coloured or sordid (K — , CaCl — ). Apotheeia minute, sessile or 

 adnate, at first concave with a prominent margin, becoming plane 

 or slightly convex ; hypothecium colourless ; paraphyses slender, 

 involved in gelatine, towards the tips a clear greenish-blue colour ; 

 spores ellipsoid, with a thin epispore, 0,011-13 mm. long, 

 0,005-7 mm. thick ; hymenial gelatine deep blue with iodine. 



In our specimens the spores are somewhat smaller than the size 

 given by Th. Fries, measuring from 0,008 x 4 mm. upwards. The 

 beautiful blue colour of the epithecium is very marked. 



Hah. On rocks. ~-B. M. Ben Lawers, Perthshire. 



192. L. commaculans Nyl. in Flora li. p. 476 (1868). — 

 Thallus effuse, thin, opaque, subareolate, the areola scattered, 

 depressed, greyish- or brownish-black (K— ,CaCl — ). Apotheeia 

 submoderate, slightly convex, scarcely margined, black, con- 

 colorous within ; paraphyses concrete ; epithecium blackish ; 

 hypothecium thickish, reddish-brown, the colour passing into the 

 hymenium ; spores oblong, 0,008-11 mm. long, 0,003-4 mm. thick ; 

 hymenial gelatine bluish with iodine. — Cromb. in Journ. Bot. 

 vii. p. 106 (1869) & Lich. Brit. p. 93 ; Leight. Lich. Fl. p. 282; 

 ed. 3, p. 287. 



Approaches L. Tiojanita Nyl., a Scandinavian plant, but differs in 

 the form of the spores and especially in the colour of the hypothecium. 



