PERTUSARIA | LECANO-LECIDEEI,. 507 
Var. y. rupicola Ny]. Flora, 1873, p. 71.—Thallus effuse, thickish, 
areolato-verrucose, sulphur- or greenish-yellow colour; fertile ver- 
ruce crowded, difform. Apothecia with the ostioles punctiform, 
blackish, depressed.—Cromb. Grevillea, xix. p. 59.—Pertusaria 
fallax var. GB. sulphurea Mudd, Mann. p. 276; Leight. Lich. Fl. 
ed. 3, p. 231. Pertusaria sulphurea var. 8. rupicola Schaer. Enum. 
(1850) p. 229. 
Differs in the deeper colour of the thallus and in the habitat. In this 
country it is very rarely fertile. The thallus is occasionally sprinkled 
with small sorediose (abortive) verruces, when it is Endocarpon sulphu- 
reum Tayl. in Mack. FI. Hib. ii. p. 100, approaching subspecies P. flavi- 
cans Lamy, Bull. Soc. Bot. t. xxv. p. 427. 
Hab. On rocks in maritime and mountainous regions.—Distr. Only a 
few localities in W. and N. England, the S.W. Highlands of Scotland, 
and W. Ireland.—B. M.: Dolgelly, Merionethshire ; Snowdon, Carnar- 
vonshire; Island of Anglesea; Ingleby Park, Cleveland, Yorkshire. 
Island of Lismore, Argyleshire ; The Trossachs, Perthshire. Dunkerron, 
co. Kerry; Dawros River, Connemara, co. Galway. 
23. P. lutescens Lamy, Bull. Soc. Bot. t. xxv. (1878) p. 427.— 
Thallus subeffuse, thin, pulverulent, yellow, at times thinly zonate 
at the circumferance ; sterile verruce transformed into concolorous 
soredia (K (CaCl) + orange-yellow). Apothecia very rare, lecano- 
roid, dilated, blackish, the margin tumid; spores 0,054-79 mm. 
long, 0,028-40 mm. thick.—Cromb. Grevillea, xix. p.59.—Isidium 
lutescens Turn. & Borr. Lich. Br. p. 87; Sm. Eng. Fl. v. p. 230. 
Lepraria lutescens Eng. Bot. t. 1529. Lepra lutescens Hoffm. Pl. 
Lich. (1784) t. 28. ff.1,2. Pertusaria fallax var. y. variolosa Fr., 
Mudd, Man. p. 276. 
Has quite a leprarioid appearance when sterile, as it always is in this 
country. By Th. M. Fries, who first described the fructification (Lich. 
Scand. p. 812) it is regarded as only a variety of the preceding. From 
this, however, it scarcely descends, while it differs in the much shorter 
spores. The apothecia have as yet been found only in Sweden. 
Hab. On the trunks of old trees, chiefly oaks, in wooded upland 
situations.— Distr. Seen from only a few loculities in S., W., and N, 
England; probably often overlooked.—B. M.: Ickworth Park, Sutfolk ; 
Epping Forest, Essex ; Ockham, Surrey; Hurstpierpoint, Sussex; New 
Forest, Hants; Oswestry, Shropshire ; near Battersby, Cleveland, York- 
shire. ‘ 
24. P. carneopallida Anzi, Nyl. Flora, 1868, p. 478.—Thallus 
hypophleodal, macular, pale or pale-glaucous (K—,CaCl—). Apo- 
thecia erumpent, minute, pseudo-lecanorine, at first plane with a 
thin, irregular, white, spurious margin, then pulvinato-convex, 
immarginate; spores 8ne, 0,018-32 mm. long, 0,011-20 mm. 
thick.—Cromb. Grevillea, xii. p. 60.—Lecidea carneopallida Nyl. 
Bot. Not. 1853, p. 183; Lich. Scand."p. 196, t.1. £9. Lichen 
cupularis With. Arr. ed. 3, iv. p. 22 pro parte (4. e. “on trees”). 
