302 CYCLOCARPINE [LECANORA 
p. 72 (1798); Dicks. Pl. Crypt. iv. p. 22; Engl. Bot. t. 1264 
(two lower figs.) (1804). Lecidea polytropa Ach. Meth. Lich. 
p. 72 (1803); S. F. Gray Nat. Arr. i. p. 475; Hook. in Sm. 
Engl. Fl. v. p. 185. L. Ehrhartiana var. polytropa Ach. Syn. 
Lich. p. 47 (1814) ; Hook. Fl. Scot. ii. p. 40. 
Exsicc. Johns. nos. 117, 265, 266; Leight. n. 179. 
A species that varies considerably in the form of the thallus, which 
may be thickish, warted or reduced to small scattered granules or 
scales or almost absent (vars. acrustacea and illusoria). The apothecia 
are generally numerous, and may be small, regularly round and 
scattered, or much swollen and sometimes aggregate ; the forms that 
follow represent extreme stages of condition that occur in the species. 
Hab. On siliceous rocks, boulders and walls in maritime and 
mountainous districts.—Distr. More or less general throughout 
the British Isles—B. M. Rozel and La Moye, Jersey; near Pen- 
zance, Cornwall; Bolt Head, Devon; Dolgelly and Aberdovey, 
Merioneth ; Lounsdale and Cliffrigg, Cleveland, Yorkshire ; Egglestone, 
Durham; Ennerdale, Cumberland; Appin, Argyll; Ben Lawers and 
Craig Tulloch, Perthshire; Portlethen, Kincardineshire; Bennaboord 
and Morrone, Braemar, Aberdeenshire; Ben Nevis, Invernessshire ; 
Kinsale, Cork; Derryquin and near Lough Caragh, Dunkerron, Kerry ; 
Doughruagh Mts., Connemara, Galway; Mallaranny, Achill, Mayo. 
Form subglobosa Cromb. Monogr. i. p. 438 (1894).—Thallus 
effuse, generally rather thin, or obsolete. Apothecia numerous, 
rather small, convex and almost subglobose, yellowish or brownish, 
the margin excluded.—L. polytropa var. conglobata Mudd Man. 
p. 152 (1861) (non Flot.) ; f. conglobata Leight. Lich. Fl. p. 197 
(1871) (non Sommerf.) ; ed. 3, p. 180. L. varia var. polytropa 
f. conglobata Cromb. Lich. Brit. p. 52 (1870). 
Exsice. Johns. n. 118; Leight. n. 152 ; Mudd n. 120. 
The same type of apothecium occurs in the species but not so 
uniformly. 
Hab. Similar to the species.—Dvzstr. Local in N. Wales, N. and 
W. England and in the Scottish Highlands.—B. M. Dolgelly, 
Merioneth ; Oswestry, Shropshire; Guisboro’ Moor and Ayton Moor, 
Cleveland, Yorkshire; West Allen Carrs, Northumberland; Braith- 
waite and Alston, Cumberland; Craig Tulloch, Perthshire; Morrone, 
Braemar, Aberdeenshire. 
Form alpigena Leight. Lich. Fl. p. 197 (1871).—Thallus 
cracked-areolate, pale-yellow, or scarcely visible. Apothecia 
large, plane or turgid and convex, appressed and very irregular 
the thalline margin thin, more or less prominent or excluded.— 
Leight. op. cit. ed. 3, p. 181 ; Cromb. Monogr. i, 438. L. varia 
var. alpigena Ach. Lich. Univ. p. 379 (1810). 
Differing from the species in the large irregular apothecia, in our 
specimens they measure up to 4 mm. across, with the thallus scarcely 
visible. 
Hab. On schistose rocks in alpine regions.—B. M. Ben Lawers, 
Perthshire. 
