376 CYCLOCARPINEE [PERTUSARIA 
walls, 25-30 » long, 14-18 » thick.—Leight. Lich. Fl. ed. 3, 
p. 235; Cromb. Monogr. i. p. 508. Lecanora coarctata var. 
inquinata Ach. Lich. Univ. p. 353 (1810). 
Exsiec. Larb. Lich. Hb. (without a number). 
Easily distinguished by the several minute dark ostioles grouped 
in a common prominent disc. Both species and form are not unlike 
some forms of Lecanora (Aspicilia) cinerea. 
Hab. On rocks in maritime and upland regions.—Distr. Scarce in 
N.E. England, W. Scotland and W. Ireland.—B. M. Barcaldine, 
Argyll; Lettermore, Connemara, Ireland. 
Form nolens Harm. Lich. Fr. v. p. 1133 (1913).—Thallus 
smooth, cracked-areolate. Apothecia one or more innate in the 
areolx, depressed:; spores 30-42 » long, 15-22 » thick. P. nolens 
Nyl. in Flora xlvii. p. 489 (1864) ; Carrollin Journ. Bot. iii. p. 289 
(1865) ; Jones in Proc. Nat. Hist. Soc. Dublin iv. p. 133 (1865) ; 
Cromb. Lich. Brit. p. 61 & Monogr. i. p. 508; Leight. Lich. Fl. 
p. 245; ed. 3, p. 235. 
Frequently regarded as synonymous with the species, but distinct 
in the depressed apothecia and the somewhat large spores. The 
epithecium gives the same reaction with potash. 
Hab. On rocks in maritime districts.—Distr. Rare in W. and 
N.E. Ireland.—Distr. Glenarm, Antrim; Lough Feagh, near Lough 
Muck, Connemara, Galway. 
Thallus sometimes sorediate. 
30. P. sulphurea Scher. Enum. p. 228 (1850) ; emend Massal. 
Ric. Lich. Crost. p. 187 (1852).—Thallus effuse, thin or often 
rather thick, plane- or warted-areolate, sometimes scabrous- 
sorediate, sulphur- or greenish-yellow coloured (K(CaCl) + orange, 
or yellowish-red), Fertile verrucz i irregular, at first 
with punctiform dark ostioles, the disc widening, with a tumid 
crenate margin ; epithecium K + violet ; spores 8 in the ascus, 
variable in size, 50-80 p long, 25-30 yp thick.—P. sulphurea var. 
rupicola Scher. Enum. p. 229 (1850). P. fallax var. sulphurea 
Mudd Man. p. 276 (1861); form swlphurea Leight. Lich. Fl. 
ed. 2, p. 482; ed. 3, p. 231. P. Wulfenii var. rupicola Nyl. in 
Bull. Soc. Linn. Norm. sér. 2, vi. p. 290 (1872); Cromb. in 
Grevillea xix. p. 59 (1891) & Monogr. i. p. 507. Endocarpon 
sulphureum Tayl. in Mackay Fl. Hib. ii. p. 100 (1836); Leight. 
Angioc. Lich. p. 15, t. 3, fig. 4. 
Frequently regarded as a variety of P. Wulfeni, but differing in 
colour, habitat, in the presence of soredia and in the spores. The 
sizes given of these have been measured from Scheerer’s specimen 
(exs. n. 595). British specimens are mostly sterile and several of 
them are dotted with small round lighter-coloured sorediose verruce, 
well seen in Taylor’s specimen of Hndocarpon sulphwrewm from 
Dunkerron. Though the latter represents the earliest trivial name, 
Scherer’s later designation is a coincidence merely and was not based 
on Taylor’s plant. 
