430 I.ICHENACEI. [LECANORA. 



sessile, plane, brownish- or reddish-yellow ; the thalline margin 

 tumid, flexuose or subcrenate ; spores ellipsoid, 0,008-11 mm. long, 

 0,005-7 mm. thick ; paraphyses not discrete, tawny-yellow at the 

 apices ; hymenial gelatine scarcely tinged, but the thecse bluish with 

 iodine. Cromb. Lich. Brit. p. 53 ; Leight. Lich. Fl. p. 205, ed. 3, 

 p. 189. Lichen epanorus Ach. Prodr. (1798) p. 39. Lecanora albo- 

 flavida Tayl. in Mack. Fl. Hib. ii. p. 260 ; Mudd, Man. p. 155. Brit. 

 Exs. : Leight. n. 397. 



Well characterized by the citrine soredia with which the thallus is 

 sprinkled throughout, and which often at length obliterate the subsqua- 

 mulose granules. In the British specimens the hypothallus is scarcely 

 visible, and the granules are more or less scattered. The apothecia are 

 present on a single specimen sparingly and not very well developed. 



Hob. On rocks and walls, chiefly schistose, in maritime and upland 

 districts. Distr. Local in N. Wales, the S.W. and Central Highlands of 

 Scotland, and in S.W. Ireland. B. M. : Cader Idris, Dolgelly (fruit), and 

 Barmouth, Merionethshire. Ballachulish, Argyleshire ; Glen Fender, 

 Blair Athole, Perthshire. Dunkerron, co. Kerry. 



115. L. varia Ach. Syn. (1814) p. 161. Thallus subdeterminate 

 or effuse, thinnish, areolato-verrucose or granulato-unequal, yellow- 

 ish-green or straw-coloured (K + yellow, CaCl ); hypothallus in- 

 distinct. Apothecia numerous, moderate, sessile, plane or subplane, 

 concolorous with the thallus or pale-yellow or sublivid, often prui- 

 noso-suffused ; the thalline margin persistent, subentire, at length 

 angulose; spores ellipsoid, 0,009-11 mm. long, 0,005-6 mm. thick; 

 paraphyses not discrete ; epithecium granulose ; hymenial gelatine 

 bluish, then somewhat sordid with iodine. Cromb. Grevillea, xviii. 

 p. 69 ; Sm. Eng. Fl. v. p. 190 pro parte ; Tayl. in Mack. Fl. Hib. 

 ii. p. 137 pro parte ; Mudd, Man. p. 149 pro parte ; Cromb. Lich. 

 Brit. p. 52 pro parte; Leight. Lich. Fl. p. 192 pro parte, ed. 3, 

 p. 176 pro parte. Rinodina varia Gray, Nat. Arr. i. p. 452. Lichen 

 varins Ehrh. Crypt. (1785) n. 68 ; Eng. Bot, t. 1666. Brit. Exs. : 

 Leight. n. 51 ; Larb. Lich. Hb. n. 215 ; Bohl. n. 107. 



A much less variable plant than its trivial name imports and as was 

 formerly supposed, in consequence of the separation by Nylander on ana- 

 tomical and other grounds of several species that follow. With us the 

 thallus is generally widely effuse and at times is very scanty. The apo- 

 thecia are often crowded, angulose, almost obliterating the thallus. The 

 spermogones, which are not unfrequent, are immersed, dark brown or 

 blackish. 



Hab. On old pales and on the trunks of trees (chiefly pines) in mari- 

 time and upland districts. Distr. General and common in Great Britain, 

 rare in the Channel Islands and apparently in Ireland. B. M. : Island of 

 Guernsey. Near Yarmouth, Suffolk ; AValthamstow, Essex ; Finchley, 

 Middlesex ; Shiere, Surrey ; St. Leonard's Forest, Sussex ; Lyndhurst, 

 New Forest, Hants ; near Bovey Tracey, S. Devon ; Elstree, Hertford- 

 shire; Gauilingay, Cambridgeshire; Gopsall Park, Leicestershire; Hay 

 Park, Herefordshire ; Battenhall, near Worcester ; Harboro' Magna, 

 Warwickshire ; Barmouth, Merionethshire ; near Shrewsbury, Shrop- 

 shire ; Ay ton, Cleveland, Yorkshire ; Wark-on-Tyne and near Hexham, 



