OF GREAT BRITAIN 389 



391. L. persimilis, Nyl. whitish or whitish-grey,, thin, minutely 

 granuloso-areolate ; apothecia black, moderate, oppressed, plane or 

 slightly convex, naked, slightly margined, internally nigricant, 

 hypothecium fuscous-black ; hymenium cinerascent ; spores fusco 

 nigrescent, oblongo-or fusiformi-ellipsoid, 3-septate. 



Parasitical on Jungermanniee, rare. 



Syn :— Nyl. in Sallsk. pro. F. et Fl. F. Not. n. s. 1. 237. Scand. 236. 

 Geog. Disthib : — Scandinavia. 

 Bot. Prov : — 15. 



Scotland : — Ben Lawers and Canlochan, Forfarshire. Dr. Stirton. 

 "Gelatina hymenea' I intense-blue. Spores .019—23 mm. long, .008 mm, 

 broad." {Nyl.) 



392. L. glaucomaria, Nyl. thallus obsolete ; merely a small 

 irregular deformed pale nigro-fuscous patch or discoloration on 

 which are the apothecia ; apothecia fusco-nigrous, opake, clustered, 

 sub-innato-sessile, plane, margin thickish, paler, entire, often sub- 

 flexuose ; hymenium fuscescent, paraphyses indistinct, cohserent, 

 apices incrassate, fusco-nigricant ; hypothecium nigro-fuscous, thin ; 

 spores 8, colourless, oblongo-ovoid, 3-septate. 



Parasitic on Lecanora glaucoma, (Hoffm.) rare. 1876. 



Syn :— Nyl. Obs. Holm. p. 177. (1852.) Scand. 245. Leight. in Linn. Trans. 

 2d. ser. 1. 239. 



Fig :-Nyl. Obs. fig. 10. Linn. Trans. 1. o. t. 32. f. 9. 10. 



Geog. Distrib : — Stockholm, France. 



But. Prov: — 6. 



Wales : — Goodwick Bay ! Pembrokeshire. (Sept. 1876. ) 



"Gelatina hymenea I pale-blue then vinous-red. Spores .021 — .025 mm. 

 long, .008 — 9 mm. broad." (Nyl.) The apothecia sometimes form warty 

 agglomerations. Spores .0235 mm. long, .009 mm. broad. Not to be con- 

 founded with Arlhonia glaucomaria, Nyl. (A. varians, .Dav. ) which grows on 

 the apothecia (not on the thallus) of L. glaucoma. 



393. L. supernula, Nyl. apothecia black, 3-6-aggregate, plane, 

 slightly margined or at length convex immarginate, internally con- 

 colorous ; paraphyses moderate or somewhat thick, apices clavate 

 cserulescenti-nigricant ; hypothecium and excipulum ccerulescenti- 

 nigricant, rubricoso-rufescent above ; spores 8, colourless, oblongo-ovoi- 

 form, 1-septate. 



Parasitic on Lecanora calcareaf. Hoffmanni, Ach. 



Syn :— Nyl. in Flora 1876. p. 574. 

 Bot. Prov :— 16. 



Scotland: — Island of Lismore. Rev. J. M. Grombie. 



"Spores .009— .014 mm. long, .004—5 mm. broad. Gelatina hymenea I 

 vinous-red." {Nyl.) 



II. ODONTOTREMA. Nyl. 



Thallus indistinct. Apothecia black, thelotremoideo-lecideine 

 or gymnotremoid, naked, at first closed, then dehiscing with 

 denticulato-ruptured proper margin. 



1. 0. longius, Nyl. thallus whitish or albido-cinerascent, effuse ; 

 apothecia black, scattered, small, rotundate or oblong, margin thin, 

 flexuose or unequal, eventually obliterated; hypothecium thin, 

 nigro-fuscous ; paraphyses distinct ; spores 8, colourless, ellipsoideo- 

 fusiform, obtuse at the apices, 3-septate. 



