246 fniAi>nii)F,i [graphis 



Hah. On the bark of trecH. — Distr. Rare in the Cliannel Islands, 

 Enp[land, Wales and Ireland. — B. M. Near St. Martin's Church, 

 Jersey ; near Penzance, Cornwall ; Ullacornbc, near Bovey Tracey, 

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

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

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

 Bernard Park, Cork ; Tore Mt. and Dinish, Killarney. 



Form taxicola Cromb. Lich. Brit. p. 100 (1870).— Differs 

 from the species in the slightly pulverulent thallus and in the 

 more prominent larger elongate apothecia which are usually 

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

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

 Nat. Hist. ser. 2, xiii. p. 210, t. 6, f. 15 (1854). 0. rubella var. 

 taxicola Mudd Man. p. 234 (1861). 



Hab. On yew. — Distr. Rare in England, Wales and Ireland. — 

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

 Balcombe and Storrington, Sussex ; Kingsdown, Kent ; Twycross, 

 Leicestershire ; Llanrychwyn, Carnarvon ; Killarney, Kerr3\ 



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

 (1858). — Thallus brownish-green, thin, continuous. Apothecia 

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

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

 in the ascus, fusifoi*m. colourless, multi-septate. — Carroll in 

 Journ. Bot. iii. p. 291' (1865); Leight. Lich. Fl. ed. 3, p. 411. 

 Graphis involuta Wallr. 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 Lecidea-\\ls.Q apothecia. 



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



91. GRAPHIS Adans. Fam. PI. ii. p. 11 (1763), pro parte; 

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

 Soc. Phys. Hist. Nat. Geneve xxix. n. 8, p. 28 (1887). Aulaco- 

 grapha Leight. in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 389 

 (1854); Mudd Man. p. 242. (PL 28.) 



Thallus crustaceous, thin, superficial or developed under the 

 bark (hypophloeodal). Algal cells Trentepohlia. Apothecia 

 (lirellse) elongate, rarely roundish, immersed then erumpent, 

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

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

 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 modern lichenologists, includes only 

 species with colourless septate spores. In the British forms the 

 apothecia! wall is mostly developed only at the sides (dimidiate) ; in 

 warmer regions species occur with a well developed carbonaceous 

 base. 



