260 GRAPHIDEI [SCLEROPHYTON 



Hah. On sluulcd rocks, rarely on trees. — Distr. Rather rare in the 

 Channel Islands, S. and N. England, and S. and W. Ireland, not recorded 

 from Scotland. — JL M. St. Peter's Valley, Jersey ; near Laiinceston, 

 near Penzance and Whitesand Bay, Cornwall ; near Plymouth, Devon ; 

 Edderton Wood, Montgomeryshire; Bettws-y-Coed, Carnarvonshire; 

 Kildale and Newton Hocks, Cleveland, Yorkshire ; Dunscombe's 

 Wood, Cork ; Muckruss Demesne and Dinish Island, Killarney, Kerry ; 

 Killery Bay and Derryclare, Connemara, Galway. 



3. E. venosa Massal. in Verh. K. K. Zool.-Bot. Ges. Wien, x. 

 p. 679 (1860), — Thallus tartarcous, dirty-cream-coloured, 

 smooth, continuous in turgescent patches, limited by a 

 black line ; verruca3 tliickish, spreading. Apothecia shortly 

 elongate, innate, slender, variously branched and curved, 

 immarginate, internally pale ; spores elongate-acicular, up to 

 13-septate, 0,038-44 mm. long, 0,003 mm. thick. — OpegrajjJia 

 venosa Sm. Engl. Bot. t. 2454 (1812) (non Pers.) ; Hook, in 

 Sm. Engl. n. V. p. 148. Platygramma elahorata Leigh t. in 

 Ann. Mag. Nat. Hist. ser. 2, xiii. p. 394, t. 7, f. 27 (1854). 

 Stigmaiidium venosum Nyl. in Mem. See. Sci. Nat. Cherb. v. 

 p. 132 (1857); Mudd Man. p. 244; Cromb. Lich. Brit. p. 101 ; 

 Leight. Lich. El. p. 390; ed. 3, p. 413. 



Characterized by the elongate apothecia and the multiseptate 

 spores. 



Hab. On old trees. — Distr. Rare in S. England and S. Ireland. — 

 B. M. Near Ryde, I. of Wight; New Forest, Hantsj Glenstale, 

 Tipperary. 



95. SCLEROPHYTON Eschw. Syst. Lich. p. 14, f. 8 (1824) 

 fide A. Zahlbr. in Engler & Prantl Pflanzenf. i. 1*, p. 105 

 (1905). Stigmatella Mudd Man. p. 252 (1861). (PI. 34.) 



Thallus crustaceous. Algal cells Trentepohlia. Apothecia 

 roundish or elongate, deeply immersed, thickly grouped, often 

 confluent ; hypothecium clear or colourless ; paraphyses slender, 

 branched ; asci clavate, 8-spored ; spores elongate-clavate or 

 fusiform, brown, pluriseptate. 



Well characterized by the brown spores. The spermogones and 

 spermatia are similar to those of Enterograjpha. 



1. S. circumscriptum A. Zahlbr. I. c. — Thallus glaucous- 

 white, thick, tartareous, irregularly cracked, at first limited by a 

 narrow line, becoming subdeterminate or effuse. Apothecia 

 minute, punctiform, crowded into small patches, solitary or 

 confluent in narrow lines, arranged in a dendroid manner 

 towards the circumference ; disc plane or slightly convex, naked 

 or pruinose ; spores elongate-clavate, dark-brown, 4-7 -septate, 

 0,020-25 mm. long, 0,005 mm. thick. — Verrucaria circumscripta 

 Tayl. in Mackay El. Hib. ii. p. 96 (1836). Sagedia circumscripta 

 Leight. Angioc. Lich. p. 24, t. 8, fig. 2 (1851). Stigmatella circum- 



