OF GREAT BRITAIN. 121 



Scotland: — Ballacheulish in Appin (in fruit) Messrs. Turner and Booker. 

 Grlencroe ! Dr. Macmillam. 



Ireland : — Dunkerron Mountains. Dr. Taylor. Pass of Keirn-na-Eigh, co. 

 Cork ; Glenmore Lake, Kerry ; Eagle's Nest, Killarney. Mr. Carroll. Cushen- 

 dun, co. Antrim. Dr. Moore, near Letterfraok ! Mr. Larbalestier. 



Walks : — Beddgelert. Mr. D. Turner. (1800). Cwmbychan ; rocks above Hen- 

 dremynaoh ; and on alder trees at Nannau. Bev. T. Salwey. Garth near Dolgelley. 

 Dr. Holl. Barmouth! 



Channel Islands :— Bonne Nuit, Jersey ! Mr. Larbalestier. 



"Spores .0045— 60 mm. long, .022— 28. broad." (Nyl.) (T. M. Fr.) 



C. medulla of thallus white, tinged red by G alone. 



12. P. olivetorum, (Ach.) externally similar to the sorediate 

 states of P. perlata, but distinguished, by chemical reaction of the 

 white medulla, which is tinged red by C alone. 



On rocks, rare. 



Syn :— Ach. Meth. 217. (1803.) Syn. 198. Nyl. Lapp. Or. 180. 



Fig :— Dill. t. 20. f. 39. B. Hepp Sporen t. 66, f. 578. 



Exs :— Tuck. 15. Anzi It. S. 99. Fries. 335. Hepp 578. Zw. 185. 



Geog. Disteib : — Europe, N. America. 



Bot. Pbov:— 2. 



England : — Danny, Sussex, in herb. Hooker, determined by Dr. Nylander. 



" Spores .014—18 mm. long, .007— .012 mm. long." (Nyl.) 



13. P. tiliacea, (Ach.) glaucescent, sub-orbicular, laciniato-lobate, 

 lacihim rotundate, smooth, margins sinuato-crenate ; apothecia badio- 

 rufescent, chiefly in the centre of the thallus, receptacle smooth, 

 margin nearly entire ; spores 8, colourless, oblong, simple ; medulla 

 white C red. 



On trees &c. 1791. 



Syn :— Ach. Meth. 215. Nyl. Syn 382. Mudd Man. 93. 



Fig :— E. Bot. 700. Hepp Sporen t. 97. f. 855. 



Exs :— Mass. 326. 327. Anzi It. S. 102. Langob. 26. Larb. 18. Rabh. 929. 



Geog. Disteib:— Europe, Asia, Africa, N. America, Australasia. 



Bot. Prov:— 1, 2...5...7...31. 



England : — Dunster, Somersetshire. Messrs. Turner and Sowerby. Lynton, 

 N. Devon ! Mr. Mudd. near Torquay ! Dr. Dcakin. New Forest ! St. Leonard's 

 Forest ! Mr. Borrer. near Cornworthy, S. Devon ; Dartmoor ! Dr. Holl, Bud- 

 leigh Salterton ! Mr Garter. Holne Chase. Buckland Woods ; Spitchwick, 

 Devon. Messrs Jones and Kingston. Foss Bridge near Cirencester. Mr. W. 

 Joshua. 



Wales : — Anglesea and Carnarvonshire. Rev Hugh Davies. Abergwynant, near 

 Dolgelley ! Dr. Holl. Gwydir Woods ! Bettws-y-coed. 



Channel Islands : — L'Etacq, Jersey ! Mr. Larbalestier. Guernsey. Bev. T. 

 Salwey. 



"Spores .002 to .0025 in long, by .001 in. broad." (Mudd.) "Spores .007— 

 .011mm. long, .005— 7 mm. broad." (Nyl.) "Spores .007— 11 mm. long, .005 

 —7 mm. broad." (T. M Fr.) 



Var. rugosula, Leight. orbicular, centre of thallus and base of 

 rotundate lacinice singularly transversely wrinkled; medulla white 

 Cred. 



On trees. 



Fig ;— Hepp Sporen t. 97. f . 855. 

 Exs :— Schaa-. 358. Zw. 53. Hepp 855. 

 Geog. Disteib :— Europe. 

 Bot. Prov :— 2, 3...19. 



England : — Near Esher Bridge ! Mr. Borrer. Chart Park, Dorking ! Mr, 

 Jenner. 

 Ireland : — Banks of Blackwater river, co. Kerry. Dr. Taylor. 



