LECIDEA] LECIDEACEiE 49 



gelatine, the numerous parasitic apothecia would perhaps rather 

 belong to the Fungi. 



Hob. On a mica-schistose boulder in a subalpine situation. — B. M. 

 Near Loch-na-Gat, Ben Lawers, Perthshire (the only locality). 



75. L. calpodes Stirton in Trans. Glasgow See. Nat. 1875, 

 p. 88. — Thallus dark-grey, cracked-areolate, the areolae some- 

 what convex, contiguous or dispersed. Apothecia black, minute, 

 numerous, innate-sessile, concave, suburceolate, acutely margined, 

 becoming plane ; hypothecium brown or pallid-brown, thin ; 

 paraphyses irregular, indistinct, branching, brownish at the apices ; 

 spores ellipsoid, almost spherical, 0,007-9 mm. long, 0,006-7 mm. 

 thick ; hy menial gelatine slightly blue then wine -red with iodine. 

 — Leight. Lich. Fl. ed. 3, p. 288. Specimen not seen. 



Hah. On rocks. 



Collected by Dr. Stirton at Killiecrankie, Perthshire. 



76. L. rubidula Nyl. in Flora Ixvii. p. 214 (1884).— Thallus 

 effuse, scarcely visible. Apothecia small, subglobose, ferruginous- 

 red ; subconcolorous within ; hypothecium not dark ; paraphyses 

 slender, not well discrete ; epithecium tawny-ochraceous (K-f- 

 purplish) ; asci saccate ; spores globose, 0,006-7 mm. in 

 diameter ; hymenial gelatine pale-bluish then tawny-wine- red 

 with iodine. Specimen not seen. 



A well-marked species with much of the aspect of Biatorella, 

 ochrophora. Nylander observes that the thalamium and hj^pothecium 

 contain chrysophanic acid, though in less degree than the epithecium. 

 Originally found in Behring's Straits, it has since been detected 

 sparingly in Yorkshire [fide Nyl. Lich. Labuan et Singapore, p. 44). 



Hah. On calcareous rocks in a hilly district. — Distr. Only in 

 N. England (Hebden, Yorkshire). 



§ iii. EuLECiDEA Nyl. in Not. Sallsk. Faun. & Fl. Fenn. 

 n. ser. v. p. 157 (1866) (PI. 7). 



Thallus very variable, at times evanescent or entirely absent. 

 Apothecia lecideine, plane or convex, black, rarely brownish- 

 black ; asci usually 8- spored ; spores simple, rarely 1-septate, 

 colourless or brownish. Spermogones with simple or simplish 

 sterigmata and straight occasionally arcuate spermatia. 



Contains a large number of species growing, with few exceptions, 

 on rocks, stones or earth, and occurring most frequently in upland or 

 alpine regions. The apothecia are usually black and carbonaceous, 

 though sometimes coloured and almost biatorine. 



77. L. protrusa Fr. Lich. Eur. p. 324 (1831).— Thallus effuse, 

 pale, sulphur-coloured, thickish, crustaceous, granular-verrucose, 

 the granules contiguous or scattered, sometimes sorediate 

 (K -f- yellow, CaCl -|- orange-red). Apothecia black, numerous, 



II. E 



