408 IICHEXACKI, [l^rXASOBA. 



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

 septate, 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. El. 

 V. p. 187 ; Cromb. Lich. Brit. p. 49 ; Leight. Lich. El. p. 228, ed. 3, 

 p. 219. — Lecania crysihe y. aipos^ila Mudd, Man. p. 141. Parmelia 

 aipospila "Wahl. in Ach. Meth. tSuppl, (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 s],;ecinieQs the thallus is 

 usuallv entirely rerrucoso-unequal or papillate, but in nature it is some- 

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

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

 almost black. The apothecia are situated chiefly on the central papillae, 

 with the thalline margin eveutually excluded. The spermogones are 

 prominent and frequent towards the circumference of the thallus, with 

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



Hah. On granitic and schistose rocks in maritime disti-icts. — Distr. 

 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, rear 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. KeiTy. 



Var. /5. maritima Xyl, Lich, Scand, (1861) p. 158, — Thallus thin, 

 granulato-rngose. subcrenate at the circumference, greyish, the hypo- 

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

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



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

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

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

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

 the granides, are frequently sublecideine. 



Sab. On granitic and schistose rocks in maritime district*;. — Distr. Very 

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

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

 cardineshire. 



85. L. poliophaea Ach. Lich. Univ. (1810) p. 398 ; AVahl. El. 

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

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

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

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

 thaUine margin thin.crenulate: spores ellipsoid, simple,0,007-13mm. 

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

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

 Leight. Lich. El. p. 214, ed. 3, p. 200. — Parmelia poliopJicea Wahl. 

 in Ach. Meth. Suppl. (1803) p. 38, Leconora spodojihcn ("Wahl.) 

 Borr. Eng. Bot. Suppl. t. 2662, f, 3 : Sm. Eng. El. v. p. ^>y7.—Brit. 

 Exs. : Cromb. n. 62. 



