440 LICHENACEI. [LECANORA. 



Looks at first sight a distinct species, but is evidently referable to 

 subsp. intricata. It is, however, a very well-marked variety characterized 

 by the constantly lecanorine apothecia and the peculiar 'habitat. The 

 hypothallus also is not distinctly visible. The apothecia are numerous 

 and crowded. 



Hub. On tufts of mosses (Grimmias and Andreseas) upon boulders in 

 alpine places. Distr. Only very sparingly on the summits of two of 

 the Grampians, Scotland. B. M. : Ben Lawers, Perthshire ; Ben-naboord, 

 Braemar, Aberdeenshire. 



126. L. stenotropa Nyl. Flora, 1872, p. 251. Thallus subeffuse, 

 thin, yellowish-greeu ; otherwise as in the preceding species. 

 Apothecia small, convex, immarginate, pale-yellowish ; paraphyses 

 thickish ; spores ellipsoid, 0,010-12 mm. long, 0,003-4 mm. thick; 

 hymenial gelatine bluish, then sordidly wine-coloured with iodine. 

 Cromb. Grevillea, xviii. p. 69. 



The thallus is little visible in the single authentic British specimen 

 (determined by Nylander) which, however, is well fertile. It differs 

 from L. potytropa, of which it may be but a subspecies, only in the 

 thicker paraphyses and thinner spores. 



Hnb. On schistose stones of a wall in an upland district (associated 

 with Lecidea leucophcea Flcerke). Distr. Only very sparinglv on one of 

 the Central Grampians, Scotland. B. M. : Craig Tulloch, Blair Athole, 

 Perthshire. 



127. L. suMntricata Nyl. Flora, 1872, p. 249. Thallus effuse, 

 very thin, granulose, ochroleucous or sordid-greyish, often obsolete 

 (Ki'+ yellowish, CaCl ). Apothecia small, plane or slightly con- 

 vex, biatoroid, variable in colour, yellowish, brown, olive, livid- 

 brown or blackish, the margin thin, entire or excluded; spores 

 ellipsoideo-oblong, 0,007-10 mm. long, 0,003-4 mm. thick ; para- 

 physes slender; hymenial gelatine bluish with iodine. Cromb. 

 Journ. Bot. 1873, p. 133 (excl. form obscurior) ; Leight. Lich. Fl. 

 ed. 3, p. 177 pro parte. Lecanora varia var. subintricata Nyl. 

 Flora, 1868, p. 478. Brit. Exs. : Cromb. n. 162 pro parte. 



As observed by Nylander, this is intermediate in appearance between 

 L. symmicta var. s<epincola and L. polytropa subsp. intricata. It is, 

 however, well distinguished from both by the smaller spores and the 

 character of the spermatia. The thallus, elsewhere somewhat variable, 

 is almost evanescent in the British specimens. Both apothecia and 

 epermogones are numerous, the latter with spermatia thinly acicular, 

 obsoletely or very slightly arcuate, 0,000-7 mm. long, 0,0005 mm. thick. 



Hob. On old pales in an upland district. Distr. As yet found only 

 among the Central Grampians, Scotland. B. M. : Glen Fender, Blair 

 Athole, Perthshire. 



128. L. sarcopis Ach. Syn. (1814) p. 176; Nyl. Flora, 1869, 

 p. 412. Tb alias subeffuse, thiunish or submoderate, graiiuloso, 

 yellowish-grey or sordid-yellow (K + yellow, CaCl ). Apothecia 



