400 



The lichen-flora 



forma ochrocheila, Nyl. margins of lirellce ochraceous ; epithecium 

 expanded, plane. 



On ivy, elm, and grass, rare. 



Syn :— Nyl. in Flora 1865. p. 212. 



Geog. Distkib : — France. 



Bot. Pbov :— 5, 6...19...31. 



England : — Arkoll TTill ! Shropshire. 



Ireland : — (Saxicole.) Dinish ! Killarney. Mr. Hardy. 



Wales : — Builth ! Radnorshire. 



Channel Islands : — L'Ancresse Common, Guernsey ! ; St. Peter's Valley ! 

 Meadow Bank, Jersey. Mr. Larbalestier. 



"Spores .014 — 15 mm. long, .004 — 5 mm. broad." (Nyl.) Spores .016 mm. 

 Jong, .003— .004 mm. broad. 



forma tenuior, Nyl. lirellas very slender and narrow, simple or 

 slightly branched, elongate, straight and curved 

 On ivy, rare. 1876. 



Bot. Prov :— 26. 



Ibeland : — Killery Bay, Galway. Mr. Larlalestier. 



7. O. atrula, Nyl. scarcely any thallus ; lirellce black, oblong, 

 short, simple, linearly arranged ; epithecium rimaeform ; spores 8, 

 colourless, fusiformi-oblong, 3-septate. 



On dry micaceo-schistose stones in shady places, rare. 1877. 



Syn :— Nyl. in Flora 1877. p. 565. 



Bot. Pbov :— 26. 



Ireland :— Kylemore. Mr. Larbalestier. (1877.) 



"Spores .016 mm. long, .0035 mm. broad." (Nyl.) 



8. 0. atricolor, Strtn. whitish, very thin, indeterminate; 

 lirellce black, innato-sessile, narrow, generally simple, somewhat 

 acute, internally cinerascent or pallido-fuscescent ; epithecium at 

 first rimosform then somewhat concave or even explanate, rugulose ; 

 spores 4-8, colourless, oblongo-ovoid, 3-septate ; paraphyses indis- 

 tinct, irregular, apices fuscous ; hypothecium fuscous-black. 



On decorticated wood. 1875. 



Stn :— Stirton in Trans. Glasgow Soe. Nat. p. 89. (1875.) 



Bot. Pbov : — 17. 



Scotland : — Near Altnaharra co. Sutherland. Dr. Stirton. (1875.) 



" Spores .015 — .021 mm. long, .004 — .0055 mm. broad. Hymenium and espe- 

 cially the subhymeneal stratum K purple. Upper part of hymenium I persis- 

 tently blue, lower part yellow and vinoso-rubescent then vinous-red. Allied to 

 O. atra." 



9. 0. Turneri, Leight. pale-dirty-yellow, fusco-limitate ; lirellce 

 very prominent, sessile, mostly simple, slender and linear; epithe- 

 cium very narrow, uniform ; proper margin plump, rounded and 

 incurved ; spores colourless, lineari-obovate, 3-septate. 



On trees, sycamore, poplar, hazel, ash, elder, birch, frequent. 



Quite distinct from O. varia f. rimalis. 



Stn :— Leight. Br. Graph. 17. (1853.) O. atrorimalis, Nyl. in Flora 1864. p. 

 488. Mudd Man. 231. 



Fig :— B. Bot. 2281. Leight. Br. Graph, t. 5. f. 10. 



Geog. Distblb : — Europe, 



Bot. Pbov :— 2, 3, 4, 5...7...10...15...19...29, 30. 



England :— Hurstpierpoint ! Sussex ; Bradwell ! Burgh ! Suffolk ! Mr. 

 Sorrer. New Forest ! Hants. Mr. Lyell. near Worcester ! Mr. Lees. Cliffrigg ! 

 Ingleby Park. Cleveland. Mr. Mudd. Essex ! Mr. Piggott. Highbeech, Epping 

 Forest ! Bev. J. M. Crombie. Colne, Essex. Mr. Varenne. Holton Park ! near 



