'230 GRAPHIDEI [OPEGRAPHA 



0,006-8 mm. loni,^ 0,002 Dim. thick (fide Nyl. Licli. Par. p. 107 

 (189C))).— Enol. Bot. t. 1789?; Leii?ht. in Ann. Mag. Nat. Hist. 

 ser. 2, xiii. p.^205, t. 5, f. 12a (1854) cfe Lich. Fl. p. 373 ; ed. 3, 

 p. 396 (incl. vars. vera and rubella) ; Miidd Man. p. 234 (inch 

 vars. vera and rufescens with var. ruhida pro parte) ; Carroll in 

 Journ. Bot. iii. p. 291 (1865); Cromb. Lich. Brit. p. 99 (incl. 

 VAV. diiiparata Ach. Syn. p. 73 (1814)). 0. rufei^cens Pers. in 

 Ust. Ann. Bo^. vii. p. 29, t. 2, f . 3a (1794) ?; Hook, in Sm. Engl. 

 Fj. V. p. 144?; Tayl. in Mackay Fl. Hib. ii. p. 105? 0. ruhida 

 Chev. Hist. Graph, p. 80, t. 18, ff. 1 & 2 (1824). Lkhen herpeticu^ 

 Ach. Lich. Suec. Prodr. p. 20 (1798). Hysierina herpetica S. F„ 

 Gray Nat. Arr. i. p. 506 (1821). H. dhparata S. F. Gray I. c. 

 Exsicc. Leight. n. 221 ; Mudd n. 214. 



Hah. On trees. — Dlstr. Rather frequent throughout the British 

 Islands.— .B. M. Near Ilsham, Torquay, and near Exeter, Devon; 

 near Lyndhurst, Hants ; Hockley AVoods, Essex ; Charlton Forest,, 

 Berks ; Oxford ; Derbyshire ; Airyholme AVood, Easby Wood, Ayton 

 a,nd Ingleby, Cleveland, Yorkshire ; near Cartland Crags, Lanarkshire ; 

 Dunkeld, Perthshire. 



Var. elegans Borr. ex Leight. in Ann. Mag. Nat. Hist. ser. 2, 

 xiii. p. 207 (1854). — Thallus slightly pulverulent or scurfy. 

 Apothecia small, curved and vs^avy, often stellate. — Mudd Man. 

 p. 235 ; f. clegans Leight. Lich. Fl. p. 374 ; ed. 3, p. 397. Var. 

 ruhida Mudd /. c. pro parte. 



Exsicc. Leight. n. 286. 



Hah. On trees. — Distr. Somewhat rare in England and Ireland. — 

 B. M. Ivy bridge and Ilsham, Torquay, Devon ; near Minstead, New 

 Forest, Hants ; St. Leonard's Forest, Sussex ; near Bath, Somerset ; 

 Hollybush Hill, Malvern, Worcestershire ; Airyholme Wood and 

 Ingleby, Cleveland, Yorkshire. 



Var. fuscata Schoer. Enum. p. 156 (1850). — Thallus dark, 

 dingy-olive, otherwise as in the species. — 0. herpetica var. 

 rufescens Mudd Man. p. 235 (1861) (excl. syn.), (& var. ruhida 

 Mudd I. c. pro parte) ; Cromb. Lich. Brit. p. 99 ; form rufescens 

 Leight. Lich. Fl. p. 375 ; ed. 3, p. 397 pro parte. 0. ruhella 

 Pers. I. c. p. 31?; Sm. Engl. Fl. t. 2347 (1811); Hook, in Sm. 

 Engl. Fl. V. p. 144. Lichen riihellus Ach. Lich. Suec. Prodr. 

 p. 22 (1798). 



Distinguished by the dark thallus. The species 0. rufescens has 

 been restricted by Nylander (Lich. Par. p. 107 (1896) ) to forms similar 

 to 0. herjyetica, but with straight spermatia, 0,004-5 mm. long, 

 0,001 mm. thick, a character I have been unable to verify in any of 

 our British specimens. 



Hah. On trees. — Distr. Not uncommon in England and Wales. — 

 B. M. Cirencester, Gloucestershire ; Chalkney Woods, White Colne 

 Hadleigh Woods, Ulting, Hatfield Peverel and Epping Forest, Essex 

 Patcham, near Worcester ; Gopsall Wood, Leicestershire ; Suffolk 

 Ingleby, Yorkshire. 



