44:2 LJCIIENACEI. [lECANOKA. 



spores oblongo-ellipsoid, 0,Ull-lS mm. long, 0,007-9 mm. thick ; 

 hymenial gelatine bluish, then sordid with iodine. — Cromb. Lich. 

 Brit. p. 52 ; Leight. Lich. Fl. p. 196, ed. 3, p. 180 ; Sm. Eng. Fl. v. 

 — Pat-melia argojiholis "Wahl. in Ach. Meth. 8uppl. (1803) p, 32. 



Varies considerably in the colour of the thallus, which in the British 

 specimens is usually whitish, so that these might be taken for 

 L. ganyaleoides, but for the character of the thalliue granules and the 

 often creuate margin of the apothecia. These are numerous and crowded, 

 becoming somewhat angulose. The spermogones are frequent with the 

 usual arcuate spermatia of this subsection. 



Hab. On rocks iu hilly and mountainous districts. — Disfr. Apparently 

 local in S.W. and N. England, X. Wales, the S.W. Highlands and the 

 S. Grampians, Scotland, and X.W. Ireland. — B. M. : Cleve Hill, 

 Somersetshire ; Trefriw, Carnarvonshire ; Pugh Crag, AVestmoreland ; 

 Gunnertou Craggy, Xorthumberland Achosragan Hill. Appin, .\rgyle- 

 shire ; Craig Calliach and Ben Lawers, Perthshire. Near Letter Hill, 

 Connemara, co. Galway. 



131. L. frustulosa Ach. Lich. Univ. (1810) p. 405; Xyl. Lich. 

 Scand. p. 166. — Thallus subdeterminate, thickish, verrucoso-areolate 

 or glebuloso-verrucose, whitish-jellow or white-sulphur-coloured, 

 the glebules usually discrete, subradiately eifigurate (K+ yellowish, 

 CaCl— ). Apothecia small, sessile, plane or somewhat convex, 

 brownish-black ; the thalline margin thickish, entire or subcrenulate, 

 at length excluded; spores oblongo-ellipsoid, 0,010-12 mm. long, 

 0,005-6 mm. thick ; paraphyscs coherent, brownish at the apices ; 

 hymenial gelatine bluish, then sordid with iodine. — Hook. Fl. Scot. 

 ii. p. 48 ; Sm. Eng. Fl. v, p. 189 : Mudd, Man. p. 145 ; Cromb. Lich. 

 Brit. p. 52; Leight. Lich. Fl. p. 196, ed. 3, p. ]79. — Rinodina 

 frustulosa Gray, Xat. Arr. i. p. 45]. Liclien frustajosus Dicks. 

 Crypt, fasc. iii. (1793) p. 13, t. 8. f. 10 : With. Arr. ed. 3, iv. p. 19 ; 

 Eng. Bot. t. 2273.— Brit. Exs. : Leight. n. 293 ; Cromb. n. 165. 



Sometimes regarded as a variety of the preceding, to which it is nearly 

 related, but is sufficiently distingui.-hed by the characters given of the 

 thallus and apothecia, as also by the altitude at which it gi'ows in this 

 coimtiy. It is rather a fine plant, conspicuous by the colour of the 

 thallus amongst the darker cryptogamic vegetation with which it is 

 associated on the rocky ledges. At times it is well fertile, though the 

 apothecia are more or less scattered. 



Hab. On mica-schist rocks in alpine situations. — Distr. Only, with 

 certaintj', on two of the S. Grampians, Scotland ; reported by Dickson 

 from Yorkshire, but this is extremely doubtful, and by Leighton erro- 

 neously from the Island of Anglesea. — B. M. : Summits of Craig 

 Calliach and Ben Lawers and above Loch-na-Gat, Ben Lawers, Perth- 

 shire. 



132. L. cMoropliaeodes Xyl. Flora, 1873, p. 290.— Thallus 

 eflFuse, verrucoso-granulate, moderate, yellowish-glaucous, the gran- 

 ules subdispcrsed or conglomerate (K-|- yellow, K (CaCl) -|- orange- 

 red). Apothecia moderate, somewhat plane or convex, reddish-brown 



