414 LIC HEX AC KI. [LECANOR.V. 



Hab. On trunks and branches of firs and on fir pales in maritime and 

 upland tracts. Distr. Kather rare in England ; not uncommon in 

 Scotland ; not seen from Wales or Ireland. B. M. : Near Leith Hill, 

 Surrey ; near Penzance, Cornwall ; Buxton, Derbyshire ; Ayton Moor, 

 Cleveland, Yorkshire; Staveley, Westmoreland. West Lomond Hill, 

 Fifeshire; Achmore, Killin, Ben Lawers, and Blaeberry Hill, Perth- 

 shire ; Durris, Kincardineshire ; Countesswells Wood, near Aberdeen ; 

 Rothiemurchus, Inverness-shire ; Applecross, Ross-shire. 



Var. /3. geographica Nyl. ex Cromb. Grevillea, xviii. p. 68. 

 Thallus finely decussate throughout, with black hypothalline lines. 

 Apothecia subminute, plane or somewhat convex, brown. L. sub- 

 fusca e. yengrapliica Mass. Kic. Lich. (1852) p. 6. Brit. Exs.: 

 Mudd, n. 113 pro parte. 



A well-marked and rather fine variety. The numerous black lines with 

 which it is everywhere limited, so that'the individual plants are of small 

 size, seem to belong to Lecidea parasema, with which it is always asso- 

 ciated in our specimens. 



Hab. On shrubs and the branches of trees, chiefly ash, in wooded 

 maritime and upland districts. Distr. Only here and there throughout 

 England, S.W. Scotland, the S.W. Highlands, and the S. Grampians ; 

 no doubt to be detected elsewhere. B. M. : St. Leonard's Forest, 

 Sussex ; New Forest, Hants ; Ullacombe, near Bovey Tracey, S. Devon ; 

 Bathampton, Somerset ; Desford, Leicestershire ; Malvernj Worcester- 

 shire ; CliflFrigg, Cleveland, Yorkshire. Airds, Appin, Argyleshire ; 

 Finlarig, Killin, Perthshire. 



92. L. atrynea Nyl. Flora, 1872, p. 250, nota 2. Thallus deter- 

 minate or indeterminate, granulate or verrucoso-areolate, whitish or 

 greyish-white (K + yellowish, CaCl ). Apothecia moderate or some- 

 what large, plane or at length convex, brown or corneous-brown, the 

 thalline margin crenulate, rarely subentire ; paraphyses thickish ; 

 epithecium brown, granuloso-iuspersed ; spores 0,011-18 mm. long, 

 0,006-9 mm. thick; hymenial gelatine bluish, then wine-reddish 

 (the thecae violet) with iodine. Cromb. Grevillea, xviii. p. 68. 

 L. subfusca e. atrynea Mudd, Man. p. 147 pro parte ; Cromb. Lich. 

 Brit. p. 51 ; Leight. Lich. Fl. p. 203, ed. 3, p. 187. Lecanora sub- 

 fusca . atrynea Ach. Lich. Univ. (1810) p. 395. 



In some conditions this also closely resembles L. rugosa, of which, as 

 noted by Ny lander (Flora, 1883, p. 107), it is almost a subspecies. The 

 British specimens, with a single exception saxicolous, are for the most part 

 not very typical. At times the apotheeia are infested with SphcBria epi- 

 cymoiia Wallr., giving them much the aspect of those of L. coilocarpa. 

 The spermogones have the spermatia (Jide Nyl. in litt.) 0,020-30 mm. long, 

 0,0005 mm. thick. 



Hab. On rocks, very rarely on trunks of trees, in maritime and upland 

 situations. Distr. Found only in a few localities in Great Britain and 

 Ireland. B. M. : Shanklin, Isle of Wight; Buxton, Derbyshire; Bar- 

 mouth, Merionethshire ; near Whitehaven, Cumberland. Killin, Perth- 

 shire ; Hill of Ardo, near Aberdeen. Dinis Island, Killarney, co. Kerrv. 



