20 LECANO-LECIDEEI [lECIDEA 



K(CaCl) + oranp;e-red). Apothecia submoderate, scattered, sub- 

 immersed, slightly convex, immarginate, reddish-brown or dark- 

 red, concolorous within ; paraphyses coherent ; hypothecium pale ; 

 si)ores ellipsoid, 0,008-1!^ mm. long, 0,005-7 mm. thick ; hymenial 

 gelatine bluish th(!n sordidly tawny-wine-coloured with iodine. — 

 S. F. Gray Nat. Arr. i. p. 459 ; Hook, in Sm. Engl. Fl. v. p. 180 : 

 Tayl. in Mackay Fl. Hib. ii. p. 126; Cromb. Lich. Brit. p. 65; 

 Leight. Lich. Fl. p. 264 ; ed. 3, p. 262. Lichen querneus Dicks. 

 Crypt, fasc. i. p. 9, t. 2. 13 (1785); Engl. Bot. t. 485 ; With. 

 Arr. ed. 3, iv. p. 11. Pyrrhospora quernea Koerb. Syst. Lich. 

 Germ. p. 209 (1855) ; Mudd Man. p. 192, t. 3. f. 75 (1861). 

 Exsicc. Leight. n. 61 ; Larb. Caesar, n. 37 ; Bohl. n. 84. 



A well-marked species, which at first sight might be taken for a 

 biatorine condition of some plant allied to Lecanora varia. It has 

 been referred to the genus Pyrrhospoi-a on account of the spores being 

 at times reddish-brown ; this colour (as in other instances) is visible 

 only in dead ones which have remained long in the asci {vide Th. 

 Fries Lich. Scand. p. 426). The thallus, often sterile, usually spreads 

 extensively over the substratum, but at times is limited by a black 

 hypothalline line. The apothecia are more or less scattered, becoming 

 somewhat difform in age. 



Hah. On the trunks of old trees, chiefly oaks, in wooded upland 

 districts. — Distr. Not uncommon in most parts of England, rare in 

 N. Wales, Ireland, and the Channel Islands ; not seen from Scotland. 

 — B. M. Kozel, Island of Jersey; Ickworth, Suffolk; Epping Forest 

 and Hadleigh Woods, Essex; Shiere, Surrey ; Wrotham, Kent; Clayton, 

 Withyham, Henfield, Wakehurst Park, Tilgate and St. Leonard's 

 Forest, Sussex ; New Forest, Hants ; Lustleigh and near Kingskers- 

 well, Devon ; Downton, Wilts ; Oakley Park, near Cirencester, 

 Gloucestershire ; near the Lodge, Herefordshire ; Crowle Road, near 

 Worcester and Ledbury, Worcestershire ; Garn Dingle, Denbighshire ; 

 Aston, Warwickshire; Royston Hill, The Wrekin, Gobowen, and 

 Buildwas, Shropshire ; Easby Wood, Cleveland, Yorkshire ; near 

 Bishop Auckland, Durham ; near Belfast, Antrim ; Castle Bernard 

 Park, Cork. 



20. L. phseops Nyl. in Not. Sallsk. Faun. & Fl. Fenn. iv. 

 p. 5 (1858). — Thallus determinate, thin, smooth, continuous, 

 rimulose, white or greyish-white (K-f- yellowish, CaCl — ); hypo- 

 thallus whitish. Apothecia small, innate, angulose, plane, immar- 

 ginate, brown or reddish-brown, concolorous within ; paraphyses 

 slender, crowded ; hypothecium reddish beneath ; spores fusiformi- 

 ellipsoid, 0,009-15 mm. long, 0,005-6 mm. thick ; hymenial 

 gelatine deep blue with iodine. — Salw. in Trans. Bot. Soc. Edin. 

 vii. p. 554 : Cromb. Lich. Brit. p. 65 ; Leight. Lich. Fl. p. 296. 

 Lecanora phseops Th. Fr. Lich. Scand. p. 287 (1874) ; Leight. 

 Lich. Fl. ed. 3, p. 181. 



Exsicc. Larb. Lich. Hb. n. 17. 



Somewhat resembles biatorine species of the section Aspicilia of 

 the genus Lecanora. From its general habit and the structure of the 

 fructification, it may perhaps with greater propriety be arranged 



