OF GREAT BRITAIN, 333 



prominent and with a thickish flexuose margin ; hypoihecium 

 colourless ; hymenium pale-bluish upwards, paraphyses distinct, 

 apices nigrescent ; spores 8, colourless, narrowly oblong, 1-septate, 

 cells binucleolate. 



On alpine and maritime rocks, rare. 1866. 



Syn :— Leight. in Ann. and Mag. Nat. Hist. 1867. 



Geog. Distrib : — Europe. 



Bot. Prov :— 6, 7...26. 



Wales :— North escarpment of Cader Idris ! (1866.) Llyn-y-Cae ! Cader Idris ; 

 rocks near Llyn Aran ! Cader Idris ; Manorbeer ! near Tenby. Llanbedrog ! 

 Barmouth ! Pen-y-rhiw ! near Fishguard, Pembrokeshire. Moel-y-gest ! 



Channel Islands :— Coast of Alderney ! Mr. Larbalestier. 



The spores are similar in shape and size to those of Verrucaria biformis, Borr. 

 .014 — .015 mm. long, .004 — .005 mm. broad. Gelatina hymenea I blue. 



forma subbiformata, Nyl. thallus areolato-diffract, areolce plane. 

 On alpine rocks, not unfrequent. 1866. 

 Bot. Prov :— 7. ..26. 



Ireland : — Doughruagh Mountain ! Kylemore ! near Tully i co. Galway. 

 Mr. Larbalestier. 



Wales :— Llyn-y-Cae ! Cader Idris. (1866.) 



245. L. holomeloides, Nyl. dusky or nigricant, thin, efiuse, sub- 

 granulate ; apothecia black, somewhat convex, immarginate, dusky 

 within ; spores 8, colourless, oblong or sub-bacillar, 1-septate, 

 variable in size ; paraphyses indistinct ; epithecium nigricant ; 

 hypoihecium nearly colourless or very slightly fuscescent ; gelatina 

 hymenea slightly blue, then yellowish, with iodine. 



On micaceo-schistose earth in alpine places, rare. 1866. 

 Syn :— Nyl. in Flora 1866. p. 369. Crombie En. 70. 

 Geog. Distrib :— Europe. 

 Bot. Prov : — 15. 



Scotland : — Near summit of Ben Lawers. Aim. Jones. 

 " Approaching L. globulosa, Elk. but with the aspect of L. melcena, Nyl. 

 Spores .010—17 mm. long, .0030—0035 mm. broad." (Nyl.) 



246. L. Lightfootii, (Sm.) greenish-white, tartareous, effuse, 

 granuloso-verrucose, (K — C — ) ; apothecia. mb-innato-sessile, plane, 

 polished, black, margin thin, smooth, paler, flexuose ; hypoihecium 

 pale-grey ; excipulum pale-brown ; hymenium brownish, paraphyses 

 conglutinate, apices fuscous ; spores 8, colourless, lineari-oblong, 

 1-septate, cells rounded and slightly dilated at the apices, small. 



On trees, birch, rare. 1784. 



Syn :— Sm. E. Bot. 1451. (1805.) Ach. Syn. 34. Nyl. Prod. 105. Mudd Man. 

 179. 



Fig :— E. Bot. 1451. Hepp Sporen t. 58. fig. 503. 



Exs:— Hepp 503. Schaer. 581. (in part), M. & N. 839. 



Geog. Distrib :— France, Germany. 



Bot. Prov :-2, 3...5...13...31. 



England:— Bev. J. Lightfoot. (1784.) Sussex! Mr. Borrer. 



Essex. Mr. Piggott. Oswestry ! Shropshire. Bev. T. Salviey. Lyndhurst, New 

 Forest. Bev. J. M. Crombie. Ardingley ! Sussex. Duntisburne Abbots ! near 

 Cirencester. Keigate Hill, Surrey. Mr. W. Joshua. Lewknor ! Tetsworth ! 

 Oxfordshire. Mr. Larbalestier. 



Scotland :— Caerlaverock road ! Dumfries. Dr. Lindsay. 



Ireland : — North of Ireland. Dr. Scott. 



Channel Islands :— Patrimoine, Jersey. Mr. Larbalestier. 



" Spores .002 in. lon» by .00075 in. broad. Spermogonia minute, punctiform, 

 immerBed in the thallodal verrucse, brown. Spermatia sub-cylindrical or ellip- 

 soid .0005— .00075 in. long by .00012 in. broad." (Mudd.) Spores .009— .010 

 mm. long, .004 mm. broad. 



