PEKTUSARTA.] LECANO-LECIDEEI. 607 



Var. y. nipicola Nyl. Flora, 1873, p. 71. — Thallus effuse, thicki.sh, 

 areolato-verrucuse, sulphur- or greenish-yellow colour ; fertile ver- 

 rucoe crowded, difform. Apothecia with the ostioles punctiforra, 

 blackish, depressed. — Cromb. Grevillca, xix. p. 59. — Fertusaria 

 fallax var. /3. sulplmrea Mudd, Mauu. p. 276 ; Leight. Lich. Fl. 

 ed. 3, ]). 231. Fertusaria suljiJturea var. /3. rupkola ISchaer. Euum. 

 (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) verrucjie, when it is Endocarpon i^ulphu- 

 reiun Tayl. in Mack. Fl. llib. ii. p. 100, approaching subspecies F.Jiavi- 

 cans Lamy, Bull. Soc. Bot. t. xxv. p. 427. 



Hab. On rocks in maritime and mountainous regifins. — Distr. Only a 

 few localities in W. and N. En<!land, 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 verruca3 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. — IsicUum 

 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. 23. ff. 1, 2. Fertusaria 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 fructihcatiou (Lich. 

 Scand. p. .312) it is regarded as only a variety of the ]neceding. From 

 this, however, it scarcely descends, Avhile 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 localities in S., W., and N. 

 England; probably often overlooked. — B. M. : Ickworth Park, Suffolk; 

 Epping Forest, Essex ; Ockham, Surrey ; Hurstpierpoiut, Sussex ; New 

 Forest, Hants ; Oswestry, Shropshire ; near Battersby, Cleveland, York- 

 shire. 



24. P. carneopallida Anzi, Xyl. Flora, 1868, p. 478.— Thallus 

 hypophlaeodal, macular, pale or pale-glaucous (K— , CaCl — ). Apo- 

 thecia erumpcnt, minute, pseudo-lecanorine, at first plane with a 

 thin, irregular, white, spurious margin, then pulvinato-convex, 

 immarginate : spores 8nas, 0,018-32 mm. long, 0,011-20 mm. 

 thick. — Cromb. Grevillea, xii. p. 60. — Lecidea carneopallida Xyl. 

 Bot. Xot. 1853, p. 183; Lich. Scand. p. 196, t. 1. f. 9. Lichen 

 cupulari-s With. Arr. ed. 3, iv. p. 22 pro parte (i. e. "on trees"). 



