LECANORA, | LECANO-LECIDEEI. 463 
rugulose, often thinly white-pruinose (epithecium K (CaCl)+red- 
dish), the thalline margin somewhat thin, entire (K (CaCl)-+red- 
dish); spores 8ne, ellipsoid, 0,054-64 mm. long, 0,080-34 mm. 
thick.—Cromb, Grevillea, xviii. p. 70.--Lecanora parella forma 
pallescens Leight. Lich. Fl. p. 189 pro parte; ed. 3, p. 202 pro parte. 
L. tertarea subsp. pallescens Cromb. Lich. Brit. p. 54 pro parte. 
Lichen patlescens Linn. F]. Suec. (1755) p. 499. Lecanora pallescens 
var. 3. tumidula Mudd, Man. p. 155.—Brit. Hxvs.: Mudd, n. 126; 
Larb. Cesar. n. 76. 
Similar to Z. parella, with which until recently it has been confounded, 
but 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 ZL. tartarea. The thallus is usually somewhat zonate 
at the circumference. 
Hab. 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. M.: St. Lawrence, Island of Jersey. Near Hastings, Sussex ; 
Shanklin, Isle of Wight; New Forest, Hants; near Lustleigh, S. Devon; 
Launceston, Cornwall; Barmouth, Merionethshire ; Trefriw, Carnarvon- 
shire; near Easby, Cleveland, Yorkshire. Barcaldine, Argyleshire. 
Macroom Demesne, co. Cork; Killarney, co. Kerry. 
157. L. Upsaliensis Nyl. ew Norrl. Not. Sillsk. pro F. et Fl. 
Fenn. Foérh. xiii. (1873) p. 332; Flora, 1881, p. 454.—Thallus 
ceffuse, 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—8ne, 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. Pl. (1758) p. 1142. 
Also closely allied to Z. parella, but differs in the nature of the habitat 
and especially in the chemical reaction of the apothecia. 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 mosses on the ground in alpine situations.— Distr. 
Only very sparingly on a few of the Grampians, Scotland.—B. M.: Craig 
Calliach, Perthshire; Morrone, Braemar, Aberdeenshire. 
158. L. geminipara Fr. fil. Lich. Scand. (1871) p. 236.—Thallus 
subeffuse, verrucose or papillose, greyish-white (K + yellowish-red) ; 
the papille subglobose or somewhat angulose, at length sorediate at 
the apices (CaCl+reddish). Apothecia on the apices of the papilla, 
concave, at length plane, purplish-black, naked ; the thalline margin 
thick, inflexed or crenate; spores 2ne, ellipsoid, 0,022-24 mm. 
long, 0,015--26 mm. thick ; hymenial gelatine deep blue with iodine. 
—Cromb. Grevillea, xviii. p. 70.—Lecanora leprothelia Nyl. Flora, 
