OF CHEAT BRITAIN, 185 



On rocks, rare. 1873. 



Syn :— Nyl. in Flora 0873.) p. 289. 



Bot. Prov :— 26... 31. 



Ireland : — Dawros River ! co. Galway, Mr. Larbalestier. 



Channel Islands : — On hard dry rocks under the shade of ivy near Archi- 

 rondel Tower, Jersey I Mr. Larbalestier. (1873.) 



" Spores ,009—013 mm. long, .005—6 mm. broad." (Nyl.) Extremely minute, 

 and easily overlooked. Much resembling externally some state of L. varia or 

 polytropa. Spores .010— .011 mm. long, .005— .006 mm, broad. 



***** Thallus K yellow G-. 



41. L. subfusca, (L.) whitish or cinerascent, more or less deter- 

 minate, thin, smooth, rimulose, granulate, verrncose, rugose or 

 diffract, hypothallus white ; apothecia /wscows or fusco-pallescent or 

 nearly black, often pruinose, plano-convex, margin persistent, 

 entire or crenulate \ spores 8, colourless, ellipsoid, simple ; thallus 

 K yellow C— . 



Forma allophana, Ach. whitish or albido-cinerascent, determin- 

 ate or sub-determinate, thin, unequal, rugose, or granidato-corru- 

 gate; apothecia plane or convex, rufo-fuscous, sub-rubricoso- 

 fuscous, fuscous-black or black, thalline margin at first entire, 

 then crenate and flexuose ; paraphyses slender, not distinct. 



On trees. 



Syn :— Ach. L. TJ. 395. (1810.) Syn. 158. Nyl. Scand. 160. Stizenberg in Bot. 

 Zeit. 1868. p. 892. 



Fig :— E. Bot. 219. Hepp Sporen t. 20. f. 183. 



Exs :— Leight. 115. Anzi It. S. 184. Sehar. 308. Spruce Amaz. 190. Bohl. 35. 

 Maudon 53. Hepp 183. Stenh. 129. Smrft. 63. 



Geog. Distrib : — Throughout the world. 



Bot. Prov :— 1, 2, 3, 4, 5 7.. .10, 11.. .15.. .17.. .(19-30). ..31. 



England :— Airyholme Wood ! Cleveland. Mr. Mudd. Oswestry ! Rev. T. 

 Salwey. Northumberland and Durham. Mr. Winch. Devon. Mr. Parfitt. Kelve- 

 don, Essex. Mr. Varenne. Midland Counties. Mr. Purton. Bedfordshire. Rev. 

 G. Abbot. Guestling, Sussex. Rev. E. N. Bloomfield. Wrekin ! Haughmond Hill ! 

 Nesscliff ! Shropshire ! 



Scotland :— Balthayock Woods! Perth. Dr. Lindsay. Long Island, Prof. 

 Balfour.. 



Ireland : — Kylemor,e Lake ! co, Galway. Mr. Larbalestier. 



Channel Islands : — Common on all the Islands. Mr. Larbalestier. 



Wales :— Glyn ! near Capel Curig. Gwydir Woods ! Bettws-y-coed, 



" Spores .0025 to .003 in. long, by .00125 in. broad." {Mudd.) " Spores .013 

 —22 mm long, .008— .012 mm. broad." (Nyl.) 



Forma Parisiensis, Nyl. cinereous, rugose or rugoso-granulate 

 or sub-verrucose, determinate, hypothallus not visible; apothecia 

 black or fuscous-black or rarely fuscous, naked, sometimes slightly 

 cassio-pruinose, moderate, nearly plane, thalline margin rugose 

 or sub-crenate ; spores 8, ellipsoid / paraphyses distinctly articulate, 

 slightly incrassate and broadly fuscescent at the apices ; gelatina 

 hymenea blue with iodine. 



On trees, rare. 



Syn :— Nyl. Luxemb. Lich. in Bull. Soc. Bot. Franc. 13. p. 368. (18C6.) 



Exs :— Rabh. 802. 



Geog. Distrlb : — Europe. 



Bot. Prov : — 2, 3. 



England:— Near Shanklin, Isle of Wight. Dr. Holl. Maidstone, Chelsfield, 

 Shoreham, Kent, Buckingham. Mr. Holmes. 



" Spores .010— .018 mm. long, .006— .008 mm. broad." (Nyl.) 



