OF GREAT BRITAIN. 373 



On mountain rooks, common. 1795; 



Syn :-Linn. Sp. PI. No. 2. (1753.) Ach. Syn. 21. Nyl. Scand. 248. Mudd 

 Man. 221. 



Fig :-E. Bot. 245. Schasr. En. t. 5. f. 3. Hoffm. PI. Lich. t. 54. f. 2, excl. 

 b. & o. 



Geog. Distbib :— Switzerland, Italy, Pyrenees, Norway, Scandinavia, Great 

 TiPfLr Tj"i:KO 



Bot. Pbov :— 1...5..,7...U...14...18...(19...30)...31. 



England :— On rocks. Sir J. E. Smith. (1795.) North of England. Mr. Hud- 

 son. Northumberland and Durham. Mr. Winch. Dartmoor. Mr. JPwfitt. Malvern 

 Hills ; Stiperstones, Shropshire. Mr. Pwrton. Devon. Mr. Holmes. Lustleigh 

 Cleve and Blackstone Rock, Devon. Rev. J. P. Jones. Haughmond Hill ! 

 Wrekin ! Caer Caradoc ! 



Scotland : — Garrynahine, Lewis. Dr. Lindsay. Long Island. Prof. Balfour. 



Ibeland :— Mountainous districts. Mr. Carroll. 



Wales : — Common. 



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



"Spores .005 to .007 in. long, by .0025 to .003 in. broad. Spermatia straight, 

 cylindrical." (Mudd.) "Spores .027—40 mm. long, .011—13 mm. broad.'' 

 (Nyl.) " Spores .022—36 mm. long .011—18 mm. broad." (2*. M. Fries.) 

 Spores .027 mm. long, .012 mm. broad. 



A most protean specie3, of which the following are the principal 

 British forms : — 



forma contigua, Schsar. citrine-yellow, tartareous, contiguous, 

 areolato-rimulose, plane; apothecia black, scattered or chiefly con- 

 fluent, and angulato-difformed, arising between the areolae from the 

 black hypothallus, plane, level with the areolae, with a very thin sharp 

 margin. 



On rocks, common. 



Syn :— Schaa-. En. 106. Mudd Man. 221. 



Fig :— Hoffm. PI. Lich. t. 53. f. 6. and t. 54. f. 2. and d. Schasr. En. t. 5. f. 3. 

 Exs :— Schaer. 172. Anzi Ital. S. 302. A. Hepp 152. M. & N. 640. b. 

 Geog. Distbib : — Switzerland, Italy. 

 Bot. Pbov:— 5... 7. 



England : — Caer Caradoc ! Shropshire. 



Wales :— Cader Idris ! Cwm Bochlwyd ! Cwm Idwal ! Aran Mowddwy ! 

 Capel Curig ! Llyn Cwlyd ! 



forma atrovirens, (L.) citrine-yellow, areolae' scattered, more or less 

 distinct and dispersed, tumid, convex; apothecia black, plane or 

 tumid, with a thin margin, arising from the black predominating 

 hypothallus or from the areolce. 



On rocks, not frequent. 



Syn —Linn. Sp. PI. 1607. (1753.) SchiBr. En. 106. NyL Scand. 248. 



Fig :— Hoffm. PI. Lich. 1. 17. f. 4. 



Exs :— Hepp. 153. Arn. 512. c. _.,.,. 



Geog. Distrtb : — Hungary, Germany, Switzerland. 



Bot. Pbov :— 7...26. „,,.,,. 



Ibeland : — Dawros river ! Galway. Mr. Lwrbalestier. 



Wales : Cwm Ffynnon Llugwy ! Moel-y-gest 1 near Tremadoc. 



forma sphoerica, Schaer. greenish-yellow, verrucoso-areolate, areolce 

 distinct or crowded, tumid, smooth ; apothecia black or brownish- 

 black, round, protuberant, elevated above the level of the areolae, convex, 

 rough, immarginate, arising from the black hypothallus or the 

 areolae. 



On rocks, frequent. 



