408 LICHEITACEI. [LKCAKORA. 



somewhat convex and sublecideine ; spores ellipsoid or oblong, 1- 

 eeptate, 0,009-14 mm. long, 0,004-6 mm. thick ; paraphyses sub- 

 moderate, brownish at the apices ; hymenial gelatine deep bluish, then 

 dark violet with iodine. Eng. Bot. Suppl. t. 2662. f. 2 ; Sm. Eng. Fl. 

 v. p. 187 ; Cromb. Lich. Brit. p. 49 ; Leight. Lich. Fl. p. 228, ed. 3, 

 p. 219. Lecania erysibe y. aipospila Mudd, Man. p. 141. Parmelia 

 aipospila Wahl. in Ach. Meth. Suppl. (1803) p. 36. Brit. Exs.: 

 Cromb. n. 159. 



A well-marked species, easily recognized by the papillose thallus and 

 the situation of the apothecia. In herbaria specimens the thallus is 

 usually entirely verrucoso-unequal or papillate, but in nature it is some- 

 what radiate at the circumference, and more or less limited by the hypo- 

 thallus. When growing in drier situations, it becomes brownish-black or 

 almost black. The apothecia are situated chiefly cm the central papilla:-, 

 with the thalline margin eventually excluded. The spermogones are 

 prominent and frequent towards the circumference of the thallus, with 

 epermatia arcuate, 0,016-23 mm. long, scarcely 0,001 mm. thick. 



Hob. On granitic and schistose rocks in maritime districts. Digtr. 

 Local though plentiful in the Channel Islands, S.W. and N.E. England, 

 N.E. Scotland, and S.W. Ireland. B. M. : Le Fret, Island of Jersey ; 

 Jerbourg, Island of Guernsey. Tolpedn Penwith, r.ear Penzance, Land's 

 End, and the Lizard, Cornwall ; Holy Island and Staples Island, North- 

 umberland. Portlethen and Cove, Kincardineshire ; near Peterhead, 

 Aberdeenshire. Shirky Island, co. Kerry. 



Var. /3. maritimaNyl.Lich. Scand. (1861) p. 158. Thallus thin, 

 granulate- rugose, subcrenate at the circumference, greyish, the hypo- 

 thallus scarcely visible ; otherwise as in the type. Cromb. Lich. 

 Brit. p. 49 ; Leight. Lich. Fl. p. 229, ed. 3, p. 219. 



Characterized by the epapillate, thinner, more continuous thallus, and 

 by the hypothallns being less distinct. Sommerfelt (Lapp. Suppl. p. 97) 

 says that the thallus at length becomes griseo-blackish, but this does 

 not occur in our few specimens. The apothecia, which are situated on 

 the granules, are frequently sublecideine. 



Hob. On granitic and schistose rocks in maritime districts. Distr. Very 

 local and scarce in S.W. and W. England, and in N.E. Scotland. B. M. : 

 Near Penzance, Cornwall ; near Douglas, Isle of Man. Portletheu, Kin- 

 cardineshire. 



85. L. poliophaea Ach. Lich. Univ. (1810) p. 398 ; Wahl. Fl. 

 Lapp. p. 410, t. 27. f. 3. Thallus subdeterminate, granulato- 

 papilloso-diffract or papilloso-verrucose, greyish- or greenish-brown 

 (K ); hypothallus fibrilloso-byssoid, whitish, often limiting the 

 thallus. Apothecia small, adnate, plane, dull-brown or brownish, the 

 thalline margin thin,crenulate; spores ellipsoid, simple, 0,007-13 mm. 

 long, 0,004-6 mm. thick ; paraphyses slender, the apices incrassate ; 

 hymenial gelatine bluish with iodine. Cromb. Lich. Brit. p. 50 ; 

 Leight. Lich. Fl. p. 214, ed. 3, p. 200. Parmelia poliophcea Wahl. 

 in Ach. Meth. Suppl. (1803) p. 38. Lecanora spodoplcea (Wahl.) 

 Borr. Eng. Bot. Suppl. t. 2662. f. 3 ; Sm. Eng. Fl. v.p. lb~. Brit. 

 Ex*. : Cromb. n. 62. 



