276 LICHEXACEI. [EICASOIJA. 



Lochay, and Kenmore, Perthshire ; Clova, Forfarshire ; Lochaber, Inver- 

 ness-shire. Dinis Island, Killarney, co. Kerry; Glenarm, co. Antrim. 



2. R. laetevirens Leight. Lich. Fl. (1871) p. 121. Thallus orbi- 

 cular, expanded, scarcely rigid, smooth or rugulose, somewhat 

 shining, laciniato-lobed, bright-green or pale-brown, or lurid ; 

 beneath tomentose, pale, the rhizinae concolorous or white, ecyphel- 

 late ; lobes roundly crenate and undulate at the margins, cyphellae 

 none (K, CaCl^). Apothecia large, scattered, reddish, the margin 

 granulato-rugulose, inflexed ; spores fusiform, 1-septate, at length 

 pale-brown, 0,026-44 mm. long, 0,009-11 mm. thick. Leight. 

 Lich. Fl. ed. 3, p. 113. Lichen Iwtevirens Lightf. Fl. Scot. ii. (1777) 

 p. 852; Eng. Bot. t. 294 ; With. Arr. ed. 3, iv. p. 58. Ricasolia 

 herbacea Cromb. Lich. Brit. p. 32. Sticta 7ierbacea Gray, Nat. Arr. 

 i. p. 431 ; Mudd, Man. p. 91, t. ii. f. 27. Parmelia herbacea Hook. 

 Fl. Scot. ii. p. 52 ; Sm. Eng. Fl. v. p. 200 ; Tayl. in Mack. Fl. Hib. 

 ii. p. 141. Lichen herbaceus Huds. Fl. Angl. ed. 2 (1778) p. 544 ; 

 Eng. Bot. t. 294 ; With. Arr. ed. 3, iv. p. 58. Lichenoides la>te- 

 virens, scutellis fulvis Dill. Muse. 195, t. 25. f. 98. Lichenoides 

 arbor eum cinereo-virens, tenue et Iceve ubique, scutellis minoribus Dill, 

 in Hay, Syn. ed. 3, p. 73, n. 64. Brit. Exs. : Leight. n. 75 ; Cromb. 

 n. 40 : Dicks. Hort. Sic. n. 23 ; Larb. Lich. Hb. n. 326. 



Also a widely expanded plant, though not so much as the preceding. 

 The thallus, which is somewhat thinly membranaceous, is of a bright 

 green colour, but in drying it becomes greyish-green and then lurid- 

 brown. The apothecia are common, as are also the spermogones, which 

 are similar to those of R. amplissima. 



Hab. On the trunks of old trees, and occasionally on mossy boulders, 

 in maritime and upland situations. Distr. General and common in the 

 hilly and mountainous regions of Great Britain ; rare in .W. Ireland and 

 the Channel Islands; abundant in the S.W. Highlands, Scotland. B. M. : 

 Near Rozel, Island of Jersey ; Shanklin and Appuldurcomb, Isle of Wight. 

 New Forest, Hampshire ; Ivy Bridge, South Brent, near Totnes, Beckey 

 Falls, and near Haberton, S. Devon ; Boconnoc and St. Minver, Cornwall ; 

 Brver Island, Scilly ; Dynevor Castle, Carmarthenshire ; Charnwood 

 Forest, Leicestershire ; Derbyshire ; near Dolgelly, Aberdovey, and Bar- 

 mouth, Merionethshire; Bettws-y-Coed, Denbighshire; Island of Ano-le- 

 sea ; Baysdale, Cleveland, Yorkshire ; near Eglestone, Durham ; Winder- 

 mere and near Stockgill, Westmoreland ; Calder Abbey, Cumberland. 

 New Galloway, Kirkcudbrightshire ; Largs, Ayrshire ; * near Inverarv, 

 Barcaldine, and Appin, Argyleshire ; The Trossachs, Bracklin Falls, Glen 

 Lochay, and Craighall, Perthshire ; Clova, Forfarshire ; Craig Cluuy, 

 Braemar, Aberdeenshire ; Lochaber, Inverness-shire ; Cawdor Wood's, 

 Nairn ; Applecross, Ross-shire. Killarney and Cromaglown, co. Kerry ; 

 near Kylemore, co. Galway. 



Tribe XV. PELTIGEREI Nyl. Mem. Soc. Cherb. ii. (1854) 

 p. 13 ; Syn. i. p. 315 : Flora, 1882, p. 457. 



Thallus frondosely dilated, membranaceous, the cortical layer dis- 

 tinctly cellular, usually wanting beneath ; gonidial layer consisting 

 of gonidimia, or more frequently, of gonimia. Apothecia peltiform, 



