246 GRAPHIDEl [gEAPHIS 



Hab. On the bark of trees. — Distr. Bare in the Channel Islands, 

 England, "Wales and Ireland. — B. M. Near St. Martin's Chnrch, 

 Jersey ; near Penzance, Cornwall ; Ullaeombe, near BoTey Tracey, 

 Devon ; near Stoner Cross, New Forest, Hants ; near Glynde, Sussex ; 

 Shiere, Surrey ; Epping Forest, Essex ; Dolgelly, Merioneth ; TreMw, 

 Carnarvon ; Hoggart's Wood, Ingleby, Cleveland, Yorkshire ; Castle 

 Bernard Park, Cork ; Tore lit. and Dinish, KUlamey. 



Form taxicola Cromb. Idch. Brit. p. 100 (1870).— MfFers 

 from the species in the slightly pulverulent thallns and in the 

 more prominent larger elongate apothecia which are usually 

 simple, and scattered or thickly congregate. — Leight. lach. Fl. 

 p. 388; ed. 3, p. 411. Opegrapha taxicola Leight. in Ann. Mag. 

 Xat. Hist. ser. 2, xui. p. 210, t. 6, f. 15 (18-54). O. rubella var. 

 taxicola Mudd Man. p. 234 (1861). 



Sab. On yew. — Distr. Bare in Fngland, Wales and Ireland. — 

 B. M. Brockenhurst, Xew Forest, Hants ; Barcombe, near Lewes, 

 Balcombe and Stonington, Sussex; Kingsdown, Kent; Twvcross, 

 Leicestershire ; Llanrychwyn, Carnarvon ; Killamey, Kerry. 



27. 0. involuta Nyl. in Mem. See. Sci. Nat. Cherb. v. p. 131 

 (l8ot). — Thallus brownish-green, thin, continuous. Apothecia 

 sessile, irregularly elongate or roundish-deformed; disc more or 

 less flattened, the margins thickish and inTolnte ; spores 4 to 6 

 in the ascus, fusiform, colourless, multi-septate. — CarroU in 

 Joum. Bot. iii. p. 291 (1S65); Leight. Lich. Fl. ed. 3, p. 411. 

 Graphis involuta WaUr. Fl. Crypt. Germ. p. 329 (1831). Specimen 

 not seen. 



Closely allied to and perhaps only a growth form of the preceding 

 from which it differs in the roundish Lt-cidea-\ike apothecia. 



Hab. On bark of holly. — Distr. Bare in S. England and S. Ireland. 



91. GEAPHIS Adans. Fam. PL ii. p. 11 (1763), pro parte; 

 Ach. Lich. Univ. p. 46 (1810), pro parte: Mnell.-Arg. in Mem. 

 Soc. Phvs. Hist. Xat. Geneve xxis. n. 8, p. 28 (1887). Aulaco- 

 grapTia Leight. in Ann Mag. Xat. Hist. ser. 2. xiii. p. 389 

 (1854); Mudd Man. p. 242. (PL 2S.) 



Thallus crustaceous, thin, superficial or developed under the 

 bark (hypophloeodal). AJgal cells Trentepohlia. Apothecia 

 (Jirellte) elongate, i-ai-ely roundish, immersed then erumpent, 

 simple or branched ; disc narrow and sUt-like, rarely somewhat 

 plane; proper margins tumid, prominent, furrowed (jitJacoyropJa) 

 or even ; hypothecium colourless or dark-coloured ; asci clavate 

 or elongate, usually 8-spored ; spores colourless, elongate, 

 pluriseptate, the cells transversely lentiform. 



The genus, as understood by modem lichenologists, includes only 

 species with colourless septate spores. In the British forms the 

 apothecial wall is mos-tly develop^ only at the sides (dimidiate) ; in 

 warmer regions species occur with a well developed carbonaceous 

 base. 



