LECANORA.] LECANO-LECIDEfl. 439 



however, are plane and margined, it is, like the preceding form, confluent 

 with the type. 



JIah. On rocks, boulders, and walls in upland and subalpine districts. 

 — Distr. Local in X. Wales, W. and X. England, and among the Gram- 

 pians, Scotland. — J3. M. : Dolgelly, Meiioneth;^hire ; near Oswestry, 

 Shropshire; Guisboro' and Ay ton Moors, Cleveland, Yorkshire, lien 

 Lawers and Craig Tulloch, Perthshire; Morrone, Braeniar, Aberdeen- 

 shire. 



Subsp. L. intricata Xyl. Flora, 1872, p. 251. — Thallus deter- 

 minate, thiuuish or submoderate, areoluto-ditfract, subeffigurate at 

 the circumference, yellowish-white or greyish-yellow (K-j- yellowish, 

 CaCl — ); hypothallus black, often limiting the thallus. Apothecia 

 small, adnate, plane or somewhat convex, lecanorine, or at length 

 often sublecidcinc, variable in colour, sordid-pale-testaceous, brown- 

 ish, olive or blackish ; spores ellipsoid or oblongo-ellipsoid, 0,010- 

 12 mm. long, 0,005-7 mm. thick. — Cromb. Grevillea, xviii. p. G9. — 

 Lecanora intricata Tayl. in Mack. Fl. Hib. ii, p. 137 ; Leiglit. Lich. 

 Fl. p. 19S, ed. 3, p. 181 . L.polytropi e. intricata, Mudd,Mau. p. 152 ; 

 Cromb. Lich. Brit. p. 52. Lecidta intricata Sm. Eiig. Fl. v. p. 185. 

 Lichen intric itus Schrad. Jouru. Eot. (1881) p. 72. — Lichen poly- 

 trojms Eng. Eot. t. 126-1, two upper tigs. Lecanora pohjtropa y. 

 alpir/ena Mudd, Man. p. 152, is merelv a state of this. — Brit. Exs. : 

 Leight. n. 153; Mudd, n. 119. 



Well distinguished as a subspecies by the more distinct hypothallus 

 and the cclour of the usually lecanorine apothecia, which, however, are 

 at length often lecideino-biatorine and iiumarginate. A lignicolous con- 

 dition, differing from the type merely in the thallus being more effuse and 

 the hy]jothallus less distinct, is rarely met with in the Highlands of 

 Scotland. 



Sab. On rocks, boulders and walls, rarely on old paliugs, in maritime 

 and mountainous districts. — Didr. Somewhat local and much less com- 

 mon than the type, in X. Wales, X. England, among the Scottish Gram- 

 pians, and in AV. Ireland. — B. M. : Barmouth and Dolgelly, Merioueth- 

 shire ; Llyn Gelrionydd, Caruarvonsliire ; Bodbury Ring, near Church 

 Stretton, Shi'opshire ; Ingleby and Kildale, Yorkshire ; Eglestone, 

 Durham; Staveley, Westmoreland ; Swinhope, Xorthumberlaud Crian- 

 laiich, Killiu, Ben Lawers, Craig Tulloch, Perthshire ; Portlethen, 

 Kincardineshire ; Morrone, Braemar, Aberdeenshire ; Ben Xevis, Inverness- 

 shire. Dunkerron, co. Kerry. 



Yar. /3. leptacina Xyl. ex Stiz. St. Gall. Xat. Ges. 1882, p. 351. 

 — Thallus small, thin, grauulato-squamulose, straw-coloured, the 

 granules smooth, crenate (K-f- yellowish, CaCl — ). Apothecia 

 moderate, plane, olive or blackish, obsoletely yellowish-suffused, the 

 thalline margin persistent, usually crenulate ; spores 0,010-12 mm. 

 long, 0,005-6 mm. thick. — Cromb. Grevillea, xviii. p. 69. — Lecanora 

 varia subsp. hptacina Cromb. Journ. Bot. 1873, p. 134 : Leight. 

 Lich. Fl. ed. 3, p. 177. Lecanora leptacina Somm. Lapp. Suppl, 

 (1826) p. 96. Lecanora varia form terrcstris Cromb. Lich. Brit, 

 p. 52 ; Leight. Lich. Fl. p. 193. 



