OF GREAT BRITAIN. 295 



144. L. lactea, (Flk.) yellow^whitish or cinerascent, thin, smooth, 

 rimoso-areolato-diffract, areolas plane, (K yellow then deep orange- 

 red) ; apothecia black, numerous, scattered or aggregate, plane, 

 innate, naked or pruinose, internally-cinerascent, margin thin, entire 

 or flexuose ; hypothecium. dark-nigro-fuscous ; spores 8, colourless, 

 ellipsoid, simple ; paraphyses distinct. 



On mountain granitic rocks, rare. 



Stn :— Flk. in Schaer. Spicil. 127. (1812.) Nyl. Seand. 230. L. ambi&m, Fr. 

 L. S. Exs. 407. Mudd Man. 206. 



Exs ;-Schier. 176. Zw. 20. Anzi Langob. 157. Leight. 301. Anzi Ital. S. 271. 

 270. Arn. 470. 



Geog. Disteib :— Switzerland, Pyrenees, Sweden, Tyrol. 



Bot. Prov:— 5...7...10...15...24. 



England : — Thirsk, Yorkshire. Mr. Baker. Mytton Bach ! Stiperstones, 

 Shropshire. 



Scotland : — Ben Lawers. Adm. Jones. Morrone and Glen Dee, Braemar ; 

 Falls of Tummell, Blair Athole. Rev. J. M. Crombie. 



Ireland ;— Limerick, Adm. Jones. 



Wales :— Capel Curig ! Mr. Borrer. Barmouth ! Glyder Vach ! Llanberis 

 ascent of Snowdon ! Conway ! Pen-maen-mawr ! Crib Coch ! Snowdon ; Llyn 

 Cwlyd ! Glyder Vach ! Cwm Cywion ! Cwm Bochlwyd ! Pass of Llanberis ! 

 Trefriw ! Llyn Geirionydd ! Craig Aderyn ! Moel Siabod ! Cwm Ffynnon 

 Lloer ! Cwm Glas ! 



"Spores .012— IB mm. long, .006 mm. broad. I blue." (Nyl.) "Spores 

 .0025 in. long, by .001 in. broad." (Mudd.) Spores .01— .0125 mm. long, 

 .0055 mm. broad. The apothecia by excessive confluence appear often as 

 gyrose. The most general colour of the thallus is yellow-whitish or yellowish 

 cream-colour, the grey cinerascent thallus is less frequent, and the csasio- 

 pruinose state of the apothecia rather rare. The chemical reaction is the 

 confirmatory character in all the states. 



145. L. nitida, (Schasr.) olivaceo-fuscous, crustaceous, nigro- 

 limitate, areolato-diffraet, areola shining, flat and dispersed in some 

 states, concave, margins upturned, whitish and sub-pulverulent, (K — 

 C — ) ; hypothallus black, often predominating ; apothecia black; at 

 first innate in the areolw, eventually superficial and sessile, plane, 

 solitary or confluent, margin thin, prominent, entire or flexuose ; 

 hypothecium nigro-fuscous ; spores 8, colourless, ellipsoid, simple. 



On alpine and maritime rocks, not unfrequent. 1856. 



Stn \—L. fumosa var. nitida, Schaer. Enum. 110. (1850.) 



Fra :— Hoffm. PI. L. t. 49. fig. 2. a. o. Hepp Sporen t. 15. f. 131. 



Exs : — Hepp 131. Anzi Langob. 84. A. 85. Leight. 278. (status hypothallo 

 preedominante). 



Geog. Distrib : — Europe. 



Bot. Prov:^— 7...2o. 



Wales: — Barmouth! (1856.) Glyder Vach! Pass of Llanberis! Snowdon; 

 Cwm Tryfaen !• Llyn Cwlyd! Crib Coch, Snowdon! Cwm Ffynnon Lioer ! 

 Cwm Ffynnon Llugwy ! 



Ireland : — Summit of Doughruagh Mountain ! co. Galway. Mr. Larbalesticr, 



Approaching L. fusco-atra var. deusta in external appearance but with diffe- 

 rent reaction. 



146. L. sub-Kochiana, Nyl. cinereous, crustaceous, thin, nigro- 

 limitate, areolato-diffraet, areola plain, (K — O — ) ; apothecia black, 

 numerous, scattered, innate, or innato-sessile, plane, margin 

 thickish, sometimes slightly paler ; hypothecium thiek t nigro-fuscous; 

 spores 8, colourless, ellipsoid, simple, (size of those of L. fuscoatra.) 



On sub-alpine rocks, not common. 1864. 



