98 CYCLOCARPINEEZ [PELTIGERA 
Leigh Woods near Bristol, Gloucestershire ; Bardon Hill and Charn- 
wood Forest, Leicestershire; Malvern, Worcestershire; near Sim- 
mond’s Yat, Monmouthshire ; Aberdovey and Barmouth, Merioneth ; 
Bettws-y-Coed, Carnarvonshire; Oswestry and Whitcliff Rocks, Shrop- 
shire; Stogdale, Cleveland, Yorkshire; near Kendal, Westmoreland ; 
Keswick, Cumberland; The Cheviots, Northumberland; New Gallo- 
way, Kirkcudbrightshire; Swanston near Edinburgh; Bowling Bay, 
Dumbartonshire; Dunoon and Barcaldine, Argyll; Loch Katrine, 
near Callander, Kenmore, Craighall and Dunkeld, Perthshire; Sidlaw 
Hills, Forfarshire ; Craig Cluny, Braemar, Aberdeenshire; Lochaber, 
Invernessshire; near Forres, Elginshire; Killarney, Kerry; Louis- 
burgh, Mayo. 
Var. muscorum Schleich. ex Scher. Enum. p. 21 (1850),— 
Thallus lobes and apothecia constantly smaller. Cromb. in 
Journ. Bot. xiv. p. 360 (1876); Leight. Lich. Fl. ed. 3, p. 105; 
f. muscorum Cromb. Monogr. 1. p. 294 (1894). 
Ezsice. Johns. n. 229. 
Hab. Among mosses at the roots of old trees in upland districts.— 
Distr. Rare in 8.W. and N. England, 8. Grampians, Scotland, and 
N.W. Ireland.—B. M. Paignton, Devon; Formby, Lancashire (on 
sandhills) ; near Whitehaven, Cumberland; Glen Lochay, Perthshire ; 
Killarney, Kerry; Kylemore, Connemara, Galway. 
§ ii. Pextipea Wain. Lich. Brés. i. p. 179 (1890). 
Algal cells bright-green (Dactylococcus) ; cephalodia present. 
9. P. aphthosa Willd. Fl. Berol. p. 347 (1787).—Thallus 
broadly membranaceous, thin or somewhat thickish, smooth and 
shining above, bright-green when moist, dull-brownish when dry, 
dotted with darker-coloured tubercle-like epigenous cephalodia. 
Apothecia roundish, moderate in size or rather large, about 
8 mm. in diameter, adnate on the ends of rather narrow thallus 
segments, reddish-brown, slightly lacerate at ‘the edges ; spores 
fusiform, 3—7-septate, colourless or pale-brown, 50-90 » long, 
5-6 p thick—Mudd Man. p. 81; Leight. Lich. Fl. p. 107; 
ed. 3, p. 101. Lichenoides digitatum letevirens, verrucis nigris 
notatum Dill. Hist. Muse. p. 207, t. 28, fig. 106 (1741). Lichen 
aphthosus L. Sp. Pl. p. 1148 (1753); Lightf. Fl. Scot. ii. p. 847 ; 
Huds. Fl. Angl. ed. 2, p. 547; With. Arr. ed. 3, iv. p. 70; 
Engl. Bot.t. 1119. Peltidea aphthosa Ach. Meth. p. 287 (1803) ; 
8. F. Gray Nat. Arr. i. p. 428; Hook. Fl. Scot. ii. p. 60 & in Sm. 
Engl. Fl. v. p. 215; Tayl. in Mackay Fl. Hib. ii. p. 153 ; Cromb. 
Lich. Brit. p. 28 & Monogr. i. p. 278. 
Exsice. Croall n. 491; Cromb. n. 147; Johns. n. 306; 
Leight. n. 321. 
Chiefly distinguished by the presence of cephalodia, as small dark 
tubercles dotted on the surface of the thallus. Supposed to resemble 
spots caused by “thrush,” hence the name aphthosa. It is more 
generally fruitful in northern localities. 
Hab. Among mosses on rocks and boulders, as also on turf-walls 
