PHTSCIA.] PHTSCIEI. 299 



clothed with small, prominent, crowded granules. Apothecia con- 

 cave, the margin thickish, inflexed and crenate. 



A rather peculiar form referable to this variety, with which it agrees, 

 except in the granulose thallus and the concave apothecia. It is allied to 

 var. subyranulosa, Nyl. (Flora, 1876, p. 281), but is larger and more 

 granulose. The granules ave usually so numerous as almost to obliterate 

 the lobes, unless at the circumference, and upon them are frequently 

 seen the young apothecia and the spermogones. It was apparently a 

 spermogoniiferous state of this that Weddell(Bull. Soc. Bot. 18(39, p. 198) 

 describes as subvar. tumida (cfr. Leight. Lich. Fl. iii. p. 133). In the 

 specimens seen the apothecia are constantly concave, arid do not become 

 plane. 



Hao. On trunks of trees and rocks in maritime, lowland, and upland 

 districts. Distr. Local and rare in S., Central, and N. England. B. M. : 

 Near Ryde, Isle of Wight; St. Minver, Cornwall; Great Comberton, 

 Worcestershire ; Weardale, Durham. 



Var. y. ectanea Nyl. Act. Soc. Linn. Bord. ser. 3, i. (1856) 

 p. 306. Thallus imbricato-laciniate, deep tawny-yellow or orange- 

 red ; laciuise narrow, multifid, plane or convex, impresso-unequal. 

 Apothecia small or moderate, the margin entire or subentire. Mudd, 

 Man. p. 113; Leight. Lich. El. p. 143, ed. 3, p. 132. Parmdia 

 parietina, ft. ectanea Ach. Lich. Univ. (1810) p. 464 pro parte. 

 Physcia parietina var. aureola Cromb. Lich. Brit. p. 38. Lichen 

 fulvus Dicks. Crypt, fasc. iii. p. 16, is perhaps referable to this 

 variety. Brit. Exs. : Larb. Cyesar. n. 1. 



Distinguished by the thallus being less determinate, intenser in colour, 

 and by the narrow and more divided lacinise. States of it sometimes 

 occur which at first sight closely resemble Lecanora elegans. In speci- 

 mens which are less closely appressed to the substratum, the under sur- 

 face of the thallus, at least towards the circumference, is occasionally 

 subconcolorous with the upper. The apothecia, which are usually nume- 

 rous, have the margin generally entire, though sometimes slightly 

 crenulate. 



Hab. On dry rocks in maritime, rarely in mountainous districts. 

 Distr. Local, though plentiful where it occurs, in the Channel Islands, 

 S W. and N. England, S. and N. Wales, in E. Scotland, and S.W. Ire- 

 land. B. M. : Islands of Jersey, Sark, and Guernsey. Bolt Head, 

 Devonshire ; Penzance, Cornwall ; Tenby, Pembrokeshire ; Barmoutb, 

 Merionethshire; Isle of Man ; Fern Islands, Northumberland; St. Bees, 

 Cumberland. Crauiond, near Edinburgh ; Portlethea, Kincardineshire ; 

 Peterhead and on the Khoil, near Ballater, Aberdeenshire. Near Black- 

 water Bridge, co. Kerry. 



4. P. polycarpa Nyl. ex Lamy, Bull. Soc. Bot. t. xxx. (1883) 

 p. 359 Thallus effuse, subpulvinate, greenish-yellow ; lobes short, 

 grannlato-conglomerate and granulate- crenate at the margins 

 (K + purple). Apothecia small or nearly moderate, numerous, 

 crowded, the margin turgid, entire ; spores 0,01115 mm. long, 

 0,006-8 mm. thick. Cromb. Grcvillea, xv. p. 78. P. parietina 

 l.pohjcarpa Mudd, Man. p. 113; Cromb. Lich. Brit. p. 38; Leight. 



