276 LICHEN ACEI. [RICASOLIA. 
t 
Lochay, and Kenmore, Perthshire ; Clova, Forfarshire; Lochaber, Inver- 
ness-shire, Dinis Island, Killarney, co. Kerry; Glenarm, co. Antrim. 
2. R. letevirens 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 rhizine concolorous or white, ecyphel- 
late ; lobes roundly crenate and undulate at the margins, cyphelle 
none (K~, CaCl_). Apothecia large, scattered, reddish, the margin 
granulato-rugulose, inflexed ; spores fusiform, l-septate, at length 
-pale-brown, 0,026-44 mm. long, 0,009-11 mm. thick.—Leight. 
Lich. Fl. ed. 3, p.1138.—Lichen letevirens 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 herbacea 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.  Lichenordes lete- 
verens, scutellis fulvis Dill. Muse. 195, t. 25. f.98.  Lichenoides 
arboreum cinereo-virens, tenue et leve ubique, scutellis minoribus Dill. 
in Ray, Syn. ed. 3, p. 73, n. 64.— Brit. Hxs.: 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 8. 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, 8. Devon; Boconnoc and St. Minver, Cornwall; 
Bryer Island, Scilly; Dynevor Castle, Carmarthenshire; Charnwood 
Forest, Leicestershire; Derbyshire; near Dolgelly, Aberdovey, and Bar- 
mouth, Merionethshire; Bettws-y-Coed, enhighebire: Island of Angle- 
sea; Baysdale, Cleveland, Yorkshire; near Eglestone, Durham; Winder- 
mere and near’ Stockgill, Westmoreland; Calder Abbey, Cumberland. 
New Galloway, Kirkcudbrightshire; Largs, Ayrshire; near Inverary, 
Barcaldine, and Appin, Argyleshire; The Trossachs, Bracklin Falls, Glen 
Lochay, and Craighall, Perthshire; Clova, Forfarshire; Craig Cluny, 
Braemar, Aberdeenshire ; Lochaber, Inverness-shire; Cawdor Woods, 
Nairn; Applecross, Ross-shire. Killarney and Cromaglown, co. Kerry; 
near Kylemore, co. Galway. 
Tribe XV. PELTIGERETI Nyl. Mém. 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, 
