LECANORA.] LECAXO-LECTDEEJ. 463 



rugulose, often thinly white-pruinose (epithecium K(CaCl) + red- 

 dish), the thalline margin somewhat thin, entire (K(CaCl) + red- 

 dish) ; spores 8nae, ellipsoid, 0,054-64 mm. long, 0,030-34 mm. 

 thick. Cromh. Grevillea, xviii. p. 70. Lecanora parella forma 

 pallescens Leight. Lich. Fl. p. 189 pro parte ; ed. 3, p. 202 pro parte. 

 L. tnrtarea subsp. pallescens Cromb. Lich. Brit. p. 54 pro parte. 

 Lichen pallescens Linn. Fl. Suec. (1755) p. 409. Lecanora pallescttis 

 var. ft. tumidula Mudd, Man. p. 155. Brit. Exs. : Mudd, n. 126 ; 

 Larb. Caesar, n. 76. 



Similar to L. parella, with which until recently it has been confounded, 

 hut differs, though probably only as a subspecies, in the reaction of the 

 thalline margin of the apothecia, which also distinguishes it from all cor- 

 ticolous states of L, tartarea. The thallus is usually somewhat zonate 

 at the circumference. 



Hob. On trunks of trees in maritime and upland situations. Distr. 

 Seen from only a few localities in Great Britain, Ireland, and the Channel 

 Islands. B. li. : St. Lawrence, Island of Jersey. Near Hastings, Sussex ; 

 Shauklin, L-le of Wight ; New Forest, Hants ; near Lustleigh, S. Devon ; 

 Launceston, Cornwall ; Barmouth, Merionethshire ; Trefriw, Carnarvon- 

 shire; near Easby, Cleveland, Yorkshire. Barcaldiue, Argyleshire. 

 Macroom Demesne, co. Cork ; Killarney, co. Kerry. 



157. L. Upsaliensis Kyi. ex Korrl. Not. Sallsk. pro F. et Fl. 

 Fenn. Forh. xiii. (1873) p. 332 ; Flora, 1881, p. 454. Thallus 

 effuse, thin, smooth or somewhat verruculose, glaucous- or greyish- 

 white (K , CaCl ). Apothecia small or submoderate, concave or 

 at length plane, pale, more or less white-pruinose (K(CaCl) ) ; the 

 thalline margin thickish, entire ; spores 4-8nae, 0,055-58 mm. long, 

 0,026-38 mm. thick. Cromb. Grevillea, xviii. p. 70 ; Leight. Lich. 

 Fl. p. 192 pro parte, ed. 3, p. 176 pro parte. Lecanora parella 

 var. Upsaliensis Cromb. Lich. Brit. p. 54. Lichen Upsaliensis Linn. 

 Sp. PI. (1753) p. 1142. 



Also closely allied to L. parella, but differs in the nature of the habitat 

 and especially in the chemical reaction of the apothncia. The thallus is 

 at first very thin and smooth, but at length becomes thicker and 

 granulate. The apothecia are usually numerous with the disc coarsely 

 granulate. 



Hab. Incrusting 

 Onlv very sparin 

 Calliach,* Perth,' 



ting mosses on the ground in alpine situations. Distr. 

 ingly on a few of the Grampians, Scotland. B. M. : Craig 

 ishire ; Morrone, Braemar, Aberdeenshire. 



158. L. geminipara Fr. fil. Lich. Scand. (1871) p. 236. Thallus 

 subeffuse, verrncose or papillose, greyish- white (K + yellowish-red; ; 

 the papilla subglobose or somewhat angulose, at length sorediate at 

 the apices (CaCl + reddish). Apothecia on the apices of the papillae, 

 concave, at length plane, purplish-black, naked ; the thalline margin 

 thick, inflexed or crenate ; spores 2nse, ellipsoid, 0,022-24 mm. 

 long, 0,015-20 mm. thick; hymeuial gelatine deep blue with iodine. 

 Cromb. Grevillea, xviii. p. 70. Lecanora leprothelia Nyl. Flora, 



