OF GREAT BRITAIN. 303 



160. L. tenebrans, Nyl. leaden-greyish or dark-leaden-coloured, 

 smoothish, continuous, rimulose (medulla I partly bluish) ; apothecia 

 black, large, scattered or aggregate, plane or subconvex, margin 

 thin, prominent, eventually obliterated ; hypothecium thick, black ; 

 spores 8, colourless, ellipsoid, simple, large ; gelatina hymenea and 

 thecee I persistently intense-blue. 



On subalpine micaceous schistose rocks, rare. 1876. 



Syn :— Nyl. in Flora 1876. p. 309, 

 Bot. Peov:— 26. 



Ireland :— Genevebol ! and summit of Doughruagh Mountain (1800 feet) 

 Galway. Mr. Larbalestier. (1876.) 



161. L. albo-ccerulescens, (Wulf.) glaucous or creamy-white, opake, 

 continuous, smooth, (K — C — ) ; apothecia closely appressed, plane, 

 ccesio^pruinose, margin thinnish, entire, more or less flexuose • 

 hypothecium thickish, dark-brown-black; spores 8, colourless' 

 narrowly oblongo-elliptical, simple, large. 



On rocks in mountainous districts, not common. 



Syn;— Wulf. ap. Jaeq. Coll. 2. 184. (1788.) Aeh. Syn. 29. excl. var. L. con- 

 tigua var. albo-cosrulescens, Nyl. Suand. 224. 



Pig :— Hoffm. PI. Lich. t. 14. f. 2. 



Exs :— Zw. 139. B. Anzi It. S. 282. 



Geog. Distkib :— Germany, Italy, Pyrenees, Hungary, Austria, Switzerland 



Bot. Pkoy :— 1...3...7...10...26. 



England : — Gardrington, Torbay. Mr. Poyrfitt. Leith Hill, Surrey. Mr. W 

 Joshua. North Bovey, Devon. Messrs. Jones <£• Kingston. 



Ireland : — Kylemore ! Mr. Larbalestier. 



Wales : — Tanybwlch wood, Capel Curig ! 



Not to be confounded with L.cyanea, (Elk.) which is similar in external 

 appearance, but has the apothecia white within and the epithecium when 

 wetted becomes pallido-rufescent. The hypothecium is sometimes interrupted 

 sometimes continuous and variable in thickness. The size of the spores incline 

 one to consider that it may be a variety of L. contigua. » 



" Spores .022— 28 mm. long, .010— 12 mm. broad." (Nyl.) ." Spores .016— 

 25 mm. long, .007—10 mm. broad." (T. M. Fries.) Spores .02— .0245 mm 

 long, .008 — 9 mm. broad. 



Vfft\ alpina, Schser. apothecia large, elevated, sessile, plane or 

 tumid, caesio-pruinose, margin thick, prominent, flexuose ; spores 

 as in the type. 



On rocks, rare. 



Syn :— Schser. Enum. 119. (1850.) Spic. 143. Mudd Man. 211 



Exs :— Zw. 129. A. Schaer. 185. Anzi It. S. 283. 



Geog. Distrib :— Switzerland^ Germany, Italy. 



Bot. Prov :— 31. 



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



■ 162. ,L. confluens, (Webr.) dull-smoky-grey, tartareous, con- 

 tinuous or areolato-rimulose, smooth or slightly rugulose, effuse or 

 sub-determinate, (K — C — ) ; hypothallus black ; apothecia nume- 

 rous, crowded or scattered, large, confluent, appressed or 

 adnate, margin thin, slightly prominent, flexuose; disk plane, in 

 age convex, of full-opake-black, very smooth, soft and velvety; hypo- 

 thecium dense, nigro-fuscous ; thalamium pale ; spores 8, colourless 

 ellipsoid, simple, small, half the size of those of L. contigua. 

 On mountain rocks, not frequent. 



Syn :-Web. Spicil. 180. (1778.) Ach, Syn. 16. pro, p. Nyl. Scand, 225 > 



