434 LICHENACEI. [LECANOEA. 



stantly biatorine apothecia and by the thalline reaction with CaCl. In 

 the few British specimens seen the thallus is comparatively small and 

 determinate ; but the apothecia are numerous and occasionally 2-3- 

 aggregate. The spermogones are only very sparingly present, with sper- 

 matia^0,018-20 mm. long, 0,0005 mm. thick. 



Hob. On trunks of firs and on old pales in maritime and upland 

 tracts. Distr. Seen only from a few localities in S. England, N. Wales, 

 the S.W. Highlands of Scotland and S.E. Ireland; no doubt to be 

 detected elsewhere. B. M. : Lyndhurst, New Forest, Hants ; Island of 

 Anglesea. Appin, Argyleshire. Great Island, co. Cork. 



Var. ft, szepincola Nyl. Flora, 1872, p. 249. Thallus effuse, 

 granulose or granuloso-unequal, at times subevanescent. Apothecia 

 biatorino-lecideine, convex, sordid-reddish or blackish : spores 

 occasionally thinly 1-septate, 0,010-17 mm. long, 0,004-5 mm. 

 thick. Leight. Lich. Fl. ed. 3, p. 183; Cromb. Grevillea, xviii. 

 p. 69. Lecanora varia var. scepincola Cromb. Lich. Brit. p. 52 ; 

 Leight. Lich. Fl. ed. 1, p. 193. Leeidea scepincola Ach. Syn. (1814) 

 p. 35. 



Evidently referable to this species, of which it is a good variety, dif- 

 fering in the colour of the apothecia and the rather longer, less simple 

 spores. The thalline reaction with CaCl at once keeps it distinct from 

 var. /3 of the following species, with which it might be confounded. 



Hob. On old pales in upland situations. -Distr. Local in N. England 

 and among the Grampians, Scotland. B. M. : Hart, Durham ; Lam- 

 plugh, Cumberland. Killin, Perthshire; Crathie, Braemar, Aberdeen- 

 shire. 



120. L. symmictera Nyl. Flora, 1 872, p. 249. Thallus effuse, 

 subleprose or subgranulose, yellowish-straw-coloured (K + yellow, 

 CaCl ). Apothecia small, biatorine, convex, concolorous with the 

 thallus, pale or dark-olivaceous, the margin excluded ; spores 

 oblong, 0,010-15 mm. long, 0,003-5 mm. thick ; hymenial gelatine 

 bluish, then tawny with iodine. Cromb. Journ. Bot. 1873, p. 133; 

 Leight. Lich. Fl. ed. 3, p. 200. Brit. Exs. : Mudd, n. 117; Larb. 

 Lich. Hb. n. 130. 



Subsimilar to the preceding species, with which till recently it has 

 been confounded, but differs at once in the reaction with CaCl. In 

 Britain it is a much more common plant, with the thallus spreading 

 extensively and the apothecia numerous. The spermogones are fre- 

 quent with spermatia as in L. symmicta. 



Hob. On old pales and the trunks of trees in maritime and upland 

 districts. Distr. General in Great Britain ; rare in the Channel Islands ; 

 not seen from Ireland. B. M. : Beauport, Island of Jersey. Henfield, 

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

 near Penzauce, Cornwall ; near Minety, Wiltshire ; Millhill, Middlesex ; 

 Gamlingay, Cambridgeshire ; Dolgelly, Merionethshire ; Island of Angle- 

 sea ; near Ayton, Cleveland, Yorkshire ; Levens, Westmoreland. New 

 Galloway, Kirkcudbrightshire ; Blairdrummond, near Stirling ; Finlarig, 

 Killin, and Ben Lawers, Perthshire; Nigg, Kincardineshire ; Crathie, 

 Braemar, Aberdeenshire. 



