LECANORA.J LECANO-LECIDEEI. 441 



lecanorine, small, plane or slightly convex, reddish-flesh-coloured or 

 reddish, the thalline margin persistent, crenulate ; spores ellipsoid, 

 0,008-12 mm. long, 0,006-8 mm. thick ; hy menial gelatine bluish 

 (the thecse often persistently), then tawny-wine-red with iodine. 

 Cromb. Grevillea, xviii. p. 69 ; Leight. Lich. Fl. p. 187 pro 

 parte, ed. 3, p. 174 pro parte. Lecanora varia subsp. sarcopis 

 Cromb. Lich. Brit. p. 52 pro parte. Parmelia sarcopis Wahl. in 

 Ach. Meth. Suppl. (1803) p. 40. To this is also referable L. sar- 

 copis subsp. hornopis Nyl. Flora, 1872, p. 251 (cfr. Nyl. Flora, 1881, 

 p. 184). 



A plant apparently constant to its type, and from the characters given 

 sufficiently diverse from the others of this subsection. It is also, and 

 more especially, distinguished by the form of the spermatia. The apo- 

 thecia in our specimens are numerous, and the spermogones are not un- 

 frequent. These have the spermatia crescent-shaped, 0,009-11 mm. long, 

 0,0025 mm. thick (ex Nyl. in litt,). 



Hub. On old (indurated) pales in upland districts. Distr. Only 

 sparingly in N. England and the Scottish Highlands. 13. M. : Near 

 Carlton, Cleveland, Yorkshire. Glen Lyon, Perthshire; Glen Dee, 

 Braemar, Aberdeeushire ; Glen Morriston, Inverness-shire. 



129. L. effusa Ach. Lich. Univ. (1810) p. 386. Thallus effuse, 

 thin, subleprose, sordid-yellow (K+ yellowish, CaCl ), at times 

 subevanescent. Apothecia lecanorine, plane, pale-reddish-brown ; 

 the thalline margin thin, subpulverulent or subcrenulatc, at length 

 convex, biatorine, immarginate ; spores 0,008-12 mm. long. 0,005- 

 7 mm. thick. Cromb. Grevillea, vi. p. 21. Lichen effusus Pers. in 

 Hoffm. Deutsch. Fl. ii. (1795) p. 174. Lecanora varia (3. sarcopis 

 Mudd, Man. p. 150 pro maxima parte ; Cromb. Lich. Brit. p. 52 pro 

 maxima parte ; Leight. Lich. Fl. p. 187, et ed. 3, p. 174 pro maxima 

 parte. Brit. Exs. : Cromb. n, 161. 



According to Nylander (Flora, 1872, p. 249) this may be only a variety 

 of the preceding with less developed thallus. It differs also in the 

 apothecia becoming biatoroid. The spermogones are as in L. sarcopis, 

 but are le?s frequently seen, at least in our specimens. 



Hab. On old pales, rarely decorticated stumps of trees, in maritime, 

 lowland, and upland tracts Distr. Here and there throughout England ; 

 rare in Scotland and the Channel Islands ; not seen from Ireland. 

 B. M. : Beauport Bay, Island of Jersey. Near Lewes, Sussex ; Lynd- 

 hurst, New Forest, Hants ; Penzance, Cornwall ; Gopsall Park, Leicester- 

 shire ; Norton, near Worcester ; near Ayton, Cleveland, Yorkshire ; 

 Teesdale, Durham ; Levens, Westmoreland". Loch Katrine and Killin, 

 Perthshire ; Crathie, Braemar, Aberdeenshire. 



130. L. argopholis Ach. Lich. Univ. (1810) p. 346 ; Nyl. Lich. 

 Scand. p. 166. Thallus subdeterminate, verrucoso-(glebuloso-) 

 granulate, firm, whitish-straw-coloured, whitish-yellow or whitish, 

 the granules continguous, imbricate, subcrenate at the circumference 

 (K+ yellow, CaCl ). Apothocia moderate, sessile, plane or convex, 

 brownish-black, the thalline margin entire or crcnate, persistent ; 



