250 GUAPIIIDlor [(JKAI'IIIH 



pp. 36i & 428. GrapMs Cerasi Ach. Lich. Univ. p. 2G8 (1810) ; 

 S. F. Gray Nat. Arr. i. p. 502. O. scripta var. recta Fr. 

 Lich. Eur. p. 371 (1831); Mudd Man. p. 239. G. serpentina 

 var. recta Leight. in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 275 

 (1854) ; var. horizontalis Leight. torn. cit. p. 271. Opegrapha recta 

 Humb. Fl. Fribcrg. p. 57 (171)3). O. hetuUna Pers. in Ust. Ann. 

 Bot. vii. p. 31 (1794). 0. Ccrasi Pern. op. cit. xi. p. 20 (1794) ; 

 Engl. Bot. t. 2301. 



^Exsice. Leight. n. 244 ; Mudd n. 217. 



Easily recognized by the linear arrangements of the apothecia, 

 which are usuallj^ rather long and narrow (f. recta), or slightly wider 

 and subpruinose (f. horizontalis). In the specimens marked 

 G. Cerasi they are mostly rather short and narrow. 



Hab. On the bark of various trees. — Distr. Somewhat rarer, but 

 coextensive with the species. — B. M. Withiel, Cornwall ; Newton 

 Bushel and Becky Falls, Devon ; New Forest, Hants ; St. Leonard's, 

 Sussex ; Shiere, Surrey ; Epping Forest, Gosfield Woods, and Ulting, 

 Essex; Barmouth, Merioneth; Abdon, Shropshire; Nantybelan, 

 Denbighshire ; Baysdale Gill, Cleveland, Yorkshire ; Beld Craig, 

 Moffat, Dumfriesshire ; Falls of Clyde, Lanarkshire ; Craigforth, 

 Stirlingshire ; near Cork. 



Var. stellata Mudd Man. p. 239 (1861).— Thallus similar to 

 the species. Apothecia short, rather plane and often pruinose, 

 arranged in more or less stellate groups, and tapering towards the 

 outer end. — f. stellata Leight. Lich. Fl. p. 365 ; ed. 3, p. 429. 

 GrapMs serpentina var. stellata Leight. iti Ann. Mag. Nat. Hist. 

 ser. 2, xiii. p. 273 (1854). 



Exsicc. Mudd n. 221 (as var. diffracfa). 



Hab. — On the bark of trees. — Distr. Somewhat rare in S. and 

 N. England. — B. M. New Forest, Hants ; near Crawley, Sussex ; 

 Messing, Essex ; Little Malvern, Worcestershire ; Ayton, Airyholme, 

 and Easby Wood, Cleveland, Yorkshire. 



Yar. minuta Mudd /. c. — Thallus similar to the species. 

 Apothecia short, simple, straight or rarely curved, narrow, rather 

 prominent, the margins thickish and uniform ; disc usually 

 narrow, sometimes slightly pruinose. — f. minuta Leight. Lich. 

 Fl. p. 363 (1871); ed. 3, p. 428. G. serpentina var. minuta 

 Leight. in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 32 (1854). 



Distr. Bare in S. and N. England and S. Ireland. — B. M. St. 

 Breock, Cornwall ; Becky Falls and Ullacombe, near Bovey Tracey, 

 Devon ; near Lyndhurst, New Forest, Hants ; Glynde, Sussex ; Weald 

 Hall Park, Essex ; Cirencester, Gloucester ; Airyholme Wood, Cleve- 

 land, Yorkshire ; Brown's Demesne, Eiverstown, Cork. 



Yar. serpentina Nyl. Lich. Scand. p. 252 (1861). — Thallus 

 superficial, thickish, white or greyish, tartareous, pulverulent, 

 determinate, or reduced to a thinnish layer. Apothecia 

 immersed in the thallus then more or less erumpent, crowded, 

 curved, simple or variously branched ; disc rather narrow. 



