234 GKAPHIDEl [OPEGRAPHA 



Forest, Hants ; Cirencester, Gloucestershire ; neaa: Lewes, near 

 Steyning, Stanmer Park, Glynde, Beeding, Axdingly and Wakehurst. 

 Sussex ; Ulting, Hockley and Hadleigh "Woods, and Epping Forest, 

 Essex; Cader Idris, Merioneth; Babraham and Madingley Park, 

 Cambridgeshire ; Easby, Kildare, Ayton, and ClifFrigg, Cleveland. 

 Yorkshire ; Barcaldlne, Argyll ; Eiverstown, Cork ; Old Dromore, 

 Killamey, Kerry ; Glenarm, Antrim. 



6. 0. prosiliens Stirton in Grevi]lea iii. p. 36 (1874). — 

 Thallus white or whitish, thin. Apothecia black, prominent, 

 ovate or oblong ; disc narrow ; margins rounded and prominent : 

 spores fusiform-ellipsoid, colourless, 3-septate, with a colourless 

 epispore, 0,020-28 mm. long, 0,006-7 mm. thick ; spermogones 

 with rod-like spermatia 0,004-6 mm. long. — Leight. Lich. Fl. 

 ed. 3, p. 403. Specimen not seeu. 



Evidently very close to O. betuUna, but with longer spores. 



Hab. On dead decorticated trees ; near Grantown, Invemessshh-e. 



7. 0. saxicola Ach. S\n. p. 71 (1814). — ThaUus efiuse, 

 greyish or greenish, or rusty-brown, thin, scurfy. Apothecia 

 scattered, oblong or ovate, long or short, variously branched or 

 difformed and angular ; disc sUt-like more or less expanded ; 

 margins tumid, rounded, incurved; asci sKghtly thickened at 

 the apex, broadly clavate ; spores elliptical or elongate-clavate, 

 colourless, becoming brownish, 3-septate, 0,016— IS mm. long or 

 somewhat longer, 0,006 mm. thick ; spermogones with rod-like 

 spermatia 0,004 mm. long ; hymenial gelatine wine-red with 

 iodine. — Cromb. Lich. Brit. p. 98 ; Leight. Lich. Fl. p. 378 pro 

 parte ; ed. 3, p. 401 px-o parte. O. rupestris Pers. in Ust. Ann. 

 Bot. xi. p. 20 (1794)?; Leight. in Ann Mag. Nat. Hist. ser. 2, 

 xiii. p. 91 (1854) ; Mudd Man. p. 228 pro parte. 



Exsicc. licight. n. 243. 



Hab. On rocks. — Distr. Somewhat rare in the Channel Islands, 

 X. England, Wales, and S.W. Ireland. — B. M. Eozel and BotdayBay, 

 Jersey; Newton, Cleveland, Yorkshire; Nantgwynant, Snowdon, 

 Trefriw and Llandudno, Carnarvonshire ; Croghan, EUamey, Kerry. 



Var. Decandollei Stiz. iu Nov. Act. Acad. Leop. Carol, xxxii. 

 4, p. 26, t. 2, fig. 2 q— z (1865).- — Thallus somewhat thicker than 

 in the species, seldom absent, yeUowish-green or greyish. 

 Apothecia prominent, massed in small groups, and growing 

 singly, linear-oblong or ovate, usually simple, obtuse at the 

 extremities ; spores elongate, rounded at the ends, 0,021-24 mm. 

 long, 0,005 mm. thick. — Cromb. Lich. Brit. p. 98 ; Leight. Lich. 

 Fl. p. 379 ; ed. 3, p. 401. 0. saxatilis DC. Fl. Fr. ii. p. 312 

 (1805) (non Leight.). 0. saxigena Tayl. in Mackay Fl. Hib. ii. 

 p. 259 (1836) ; Leight. in Ann. Mag. Nat. Hist. ser. 2, xiii. p. 93 

 (1854). 0. rupestris var. saxigena Mudd Man. p. 229 (1861). 



Exsicc. Leight. n. 311. 



Hab. On rocks, chiefly calcareous. — Distr. Xot common in the 

 Channel Islands, X. England, "Wales, Scotland and S. and "W. Ireland. 



