PEETUSARIA.] lECAXO-LECTDEEI. 505 



saffron-red, CaCl — ). Apothecia rugoso-difForm, innate in non- 

 prominent thalline areolae, brownish-black, internally subincolorous ; 

 spores 2nsc (rarely 3-4nc'e), olive-blackish (K + violet), 0,090-130 

 mm. long, 0,05o-^-3 mm. thick. — Cromb. Grevillea, xix. p. 59. — 

 P. spilomanthodes Nvl. Plora, 1881, p. 179; Cromb. GreviUea, x. 

 p. 26.— Brit. Krs. : Mudd, n. 2(5U. 



With the following well characterized by the blackish spores, though 

 Mudd erroneously describes them (in their immature state) as pale- 

 yellowish-greeu or pale-yellow. It comes very near P. spilomantha Xyl., 

 a plant of the Eastern Pyrenees, but diffei*s in the normally 2-spored 

 thecfe and the smaller spores. The apothecia are rather scattered in the 

 specimens seen. 



Sab. On rocks and walls in upland districts. — Distr. Only sparingly 

 in a few localities of N. England. — B. M. : A^ton Moor, Cleveland, 

 Yorkshire ; Ennerdale, Cumberland. 



21. P. urceolaria Xyl. Bull. 8oc. Linn. Xormand. vi. (1873) 

 p. 324 (nota). — Thallus effuse, thin, areolato-rimose, subpapilloso- 

 scabrid, greyish- or yellowish-white (K-|- yellow, then orange-red, 

 CaCl — ). Apothecia small, depressed, urceolariiform, black; spores 

 l-4nae, blackish (K-j- violet), 0,100-140 mm. long, 0,050-75 mm 

 thick. — Cromb. Grevillea, xix. p. 59 ; Leight. Lich. Fl. ed. 3, p. 238 

 pro parte. 



An endemic plant ea.sily recognized by the urceolato-depressed apo- 

 thecia. It is allied to the preceding species, but differs in the thallus 

 being more or less rough with papillag and in the form of the fruit. The 

 two specimens seen are well fertile. 



Mab. On granitic stones of a wall in a maritime district. — Disfr. Ex- 

 tremely local in one of the Channel Islands. — B. M. : La Moye, Island of 

 Jersey. 



C. Thecce pluri-spored ; spores colourless. 



a. Spores Snae. 



22. P. Wulfenii DC. Fl. Fr. ii. (1805) p. 320.— Thallus deter- 

 minate or siibetfuse, membranaceo-cartilaginous, thickish, plicato- 

 rugose, rimose, whitish- or greyish-yellow (Kf-j- yellowish, K(CaCl) 

 -|-orange-vellow) ; fertile verrucae crowded, irregularly depresso- 

 globose or difform. Apothecia with the ostiola dilated, confluent, 

 difform, sublecanoroid, blackish, undulate and subcrenate at the 

 margin (epithecium K-|- violet); spores 0,058-85 mm. long, 0,028- 

 38 mm. thick. — Cromb. Grevillea, xix. p. 59. — P. fciUax (Ach.) 

 Sm. Eng. Fl. v. p. 160 ; Leight. Br. Angio. Lich. p. 29, t. 10. 

 f . 2 ; Mudd, Man. p. 276 ; Cromb. Lich. Brit. p. 60 ; Leight. 

 Lich. Fl. p. 240, ed. 3, p. 231. Lichen hymenius, Eng. Sot. 

 t. 1731. Thelotrema Tiymenium Turn. & Borr. Lich. Br. p. 185. 

 Porina hymeaea Gray, Xat. Arr. i. p. 495. Porina fallax Tayl. in 

 Mack. Fl. Hib. ii. p. 102. Lichtncricles verrucosum et rwjosum, cine- 

 reum, glahrum Dill. Muse. 128, t. 18. f. 9 pro parte. — Brit. Exs. : 

 Mudd, n. 266 ; Leight. n. 71. 



