154 THE LICHEN-FLORA 



Syn :— Nyl. Scand. 125. 

 Exs :— Flk. D. L. 151. 

 Geog. Distkib :— Europe. 

 Bot. Pkov:— 26. 



Ireland : — South side Killery Bay ! Lettermore ! Galway. Mr. Larbalestier. 

 (1876.) 

 Spores .027. mm. krag, .011 mm. broad. 



9. P. plumbea, (Lightf.) livido-cinerascent, submonophyllotis, 

 orbicular, adnate, frequently granuloso-rugose in the centre, radiato- 

 incised, lacinice longtititdinally radiato-plicato-rugose or striated, con- 

 centrically arcuato-rugulose towards the margins, which are broadly 

 expanded and crenate, hypoihallus dark, plumbeo-ccerulescent, tomen- 

 toso-filamentose ; apothecia reddish-brown, plane, margin paler, 

 entire ; spores 8, colourless, ellipsoid, simple. 



On trees, rare. 1777. 



Syn : -Ligbtfoot Fl. Soot. 2. 826. (1777.) Acb. Syn. 202. Coccocarpia, Nyl. 

 Scand. 128. Mudd Man. 121. 



Fig :— Ligbtfoot Fl. Scot. t. 26. 



Exs :— M. & N. 939. Maudon 14. Scbaer. 564. Larbal. 72. Leigbt. 233. 



Geog. Distkib : — Europe, N. Africa. 



Bot. Phov :— 1, 2.. .6, 7.. .11, 12, 13.. .15.. .19, 20.. .26.. .31. 



England : — Keswick ! Cumberland. Mrs. Stangcr. near Eglestone, Durham. 

 Rev. J. Harriman. Sussex. Mr. J. BTemmings. near Bodmin and Liskeard. 

 Messrs. Turner and Soiverby. Healey-field and Jliddleton-in-Teesdale, Durham. 

 Mr. Winch. S. Devon and Cornwall. Dr. BToll. Appuldercombe, Isle of Wight. 

 Rev. A. Bloxam. 



Scotland : — Fall of Foyers, Caledonian Canal ; Glen Nevis, Lochaber ; Loch- 

 Lomond between Tarbet and Arrochar ! Dr. Lindsay. Drumlanrig ; Barntim- 

 perm Linn, Moffatt. Dr. Burgess. Birks of Aberfeldy. Mr. Macmillan. Glen 

 Fallocb ; Killin. Dr. Boll. Grampians. Rev. J. M. Crombie. 



Ireland : — Killarney ; Gougaunebarra ; Cork ; &c. Mr. Carroll. Mucroas ; 

 Killarney. Dr. Garrington. Derryclare Island ! co. Galway. Mr. Larbalestier. 



Wales : — Near Beaumaris ! Rev. A. Bloxam. Cardiganshire. Sir J. E. Smith. 

 Gwydir Woods ! Bettws-y-coed ! 



Channel Islands : — Guernsey. Rev. T. Salwey. Alderney ; La Coupe, Jersey; 

 Cr^vichou ! Mr. Larbalestier. 



" Spores .003 to .004in. long, by .001 to . 00125 in. broad." (Mudd.) " Spores 

 .014—22 mm. long, .007—9 .mm broad. (Nyl.) 



f. myriocarpa, (Del.) centre of thallus granuloso-rugose or micro- 

 phylline. 



On trees, frequent. 



Stn :— Nyl. Scand. 128. 



Exs :— Crombie 57. Desmaz. Cr. Fr. ed. 1. 1938, ed. 2. 1588. Larb. 72. Maud. 

 14. Anzi Etr. 11. 

 Bot. Peov:— 7...31. 

 Wales : — Beaumaris ! Rev. A. Bloxam. 

 Channel Islands :— Jersey. Mr. Larbalestier. 



B. Spores 1-septate. 



10. P. nigra, (Huds.) dark cinereo-nigricant or fuscous-black or black, 

 minutely and densely coralloideo-granuloso-crustaceous, diffracto- 

 areolate, bounded by an expanded distinct bluish-black byssoid 

 hypothallus ; apothecia black, plane or slightly convex, margin 

 entire, concolorous, hypothecium nigro-f>Mcous ; spores 8, colourless, 

 ellipsoid, 1-septate, cells nucleolate. 



On calcareous rocks. 1778. 



Stn :-Hudson Fl. Angl. ed. 2. 524. (1778) Nyl. Scand. 126. Collcma, Ach. 

 Syn. 308. ' ^ 



