212 CYCLOCARPINE® [PLACODIUM 
Var. stilicidiorum Hepp Flecht. Eur. n. 406 (1857).— 
Thallus very thin, leprose, greyish-white; hypothallus not - 
visible. Apothecia rather small, the disc greyish, or dark olive- 
green and pruinose, the margin greyish-white, often flexuose. — 
Lichen stilicidiorwm Hornem. in F]. Dan. t. 1063, fig. 2 (1792). 
L. chloroleucus Sm. Engl. Bot. t. 1373 (1805).  Lecanora 
chloroleuca Ach. Syn. Lich. p. 160 (1814); Hook. Fl. Scot. ii. 
p. 48 & in Sm. Engl. Fl. v. p. 190. ZL. cerina var. stilicidiorum 
Nyl. in Mem. Soc. Sci. Nat. Cherb. v. p. 112 (1857) ; Cromb, 
Lich. Brit. p. 47 & Monogr. i. p. 381; Leight. Lich. FI. p. 22] ; 
ed. 3, p. 210. Rinodina stilicidiorum S. F. Gray Nat. Arr. i. 
p. 456 (1821). Callopisma cerinum var.  stilicidiorum Massal. 
Monogr. Lich. Blast. p. 86 (1853) ; Mudd Man. p. 136. 
Exsice. Johns. n. 107. 
Differs from the species in the habitat, the leprose thallus, colour 
of apothecia, etc. 
Hab. Incrusting mosses on calcareous rocks in inland and upland 
situations.—Dzistr. Somewhat common in Great Britain, not recorded 
from Ireland.—B. M. Dartmoor, Devon; Dovedale, Derbyshire ; 
Egeglestone, Durham; Cunswick Scar, Westmoreland; near Stretton, 
Cumberland; Achosragan Hill, Appin, Argyll; Ben Lawers and 
Craig Tulloch, Perthshire; Craig Guie and Morrone, Braemar, 
Aberdeenshire. 
Var. chlorinum Anzi Catal. Lich. Sondr. p. 41 (1860),— 
Thallus effuse, granular, areolate, dull dirty-green. Apothecia 
dull-orange, the margin greyish-white.—Zeora cerina var. chlorina 
Flot. in Uebers. Schles. Ges. Vat. Cult. p. 126 (1850). Callopisma 
cerinum var. chlorinum Mudd Man. ’ 136 (1861). Lecanora 
cerina var. chlorina Leight. Lich. Fl. p. 221 (1871); ed. 3, p. 210; 
supsp. chlorina Lamy in Bull. Soe. Bot. Fr. xxv. p. 505 ’(1878) ; 
Cromb. in Grevillea xviii. p. 46 & Monogr. i. p. 381. 
Exsice. Johns. n, 192; Larb. Lich. Hb. n, 22. 
Distinguished from the species by the thicker and darker thallus. 
Hab. On shady rocks in upland situations.—Distr. Rare in N. 
England and W. Ireland.—B. M. Newton, Cleveland; Levens Park, 
Westmoreland ; Chollerford, Northumberland ; Lough Corrib, Galway. 
Form cyanopolium A. L. Sm.—Thallus subleprose, thickish, 
coarsely areolate, dull-grey or bluish-grey. Apothecia moderate 
in size, the disc orange, the margin bluish-grey, flexuose, at 
length excluded.—Lecanora cerina f. cyanopolia Nyl. in Not. 
Sillsk. Faun, & Fl. Fenn. Forh. n. ser. v. p. 128 (1866); Leight. 
Lich. Fl. ed. 3, p. 211; Cromb. Monogr. i. p. 382. 
Almost exactly similar to the variety, but with slight differences 
in thallus and apothecia, 
Hab. On wet stones in upland districts.—Distr. Rare in N. 
England and W, Ireland.—B. M. Chollerford, Northumberland ; 
between Lough Feagh and Lough Muck, Connemara, Galway. 
