OF GREAT BRITAIN. 321 



forma opegrap7dna, Leight. thallus obliterated ; apothecia coacer- 

 vate into gyrocarpous or opegraphine minute clusters. 



Stn :— Leighton in Grevillea 5. p. 10. (1876.) Leight. Br. Graph, p. 12. 

 Fig :— Leight. Br. Graph, t. 5. f. 6. a. b. 

 Bot. Prov :— 6, 7. 



Wales :— Anglesea ! Rev. Hugh Davies. North Cliff, Tenby ! (1872.) Cwm 

 Ffynnon Lloer ! Nant Francon. 



207. L. vernicoma, Tuck, viridi-stramineous, crustaceous, 

 effuse, subtartareous, composed of minute granules, at length conglo- 

 merated into a subrimose crust ; apothecia black, rather small, 

 appressed, nearly plane, with a thin erect evanescent margin. 



On stones and. rocks. 



Stn :— Tuck. Enum. Lich. N. Amer. Suppl. 1. p. 429. (1858.) 

 Geog. Distrib : — N. America. 

 Bot. Prov :— 31. 



Channel Islands :— Fliquet Bay ! and La Moye ! Jersey. Mr. Larbalestier. 

 Specimens from the above localities, which I have seen, are evidently saxi- 

 colar forms of L. myriocarpa. 



208. L. nigritula, Nyl. cinerascent, minutely granulose, or pul- 

 vereo-granulose, thin, indeterminate or evanescent, (K — C — ) ; apo- 

 thecia minute, opake, plane or sub-convex, black, margin thin, 

 soon obliterated ; hypothecium fuscous or fuscescent, excipulum late- 

 ral, nigro-fuscous ; spores 8, fuscous, ellipsoid or oblong, 1 -septate, 

 minute ; epispore thin. 



On trees, oak, pine, and wood, rare. 1861. 



Stn:— Nyl. in Bot. Notis. 1853. p. 99. Scand. 238. Mudd Man. 217. 



Fig : — Hepp Sporen t. 6. f. 43. 



Exs :— Nyl. 62. Zw. 126. Hepp 43. Anzi It. S. 293. 



Geoo. Distrib : — Paris, Germany, Switzerland, Italy, Hungary, Denmark, 

 Sweden, Norway, Finland. 



Bot. Prov:— 2, 3...7...10. 



England : — New Forest, Hants. Adm. Jones. Farndale, Cleveland. Mr. 

 Mudd. (1861.) Seven Oaks, Toy's Hill, Hythe, Kent ! Mr. Holmes. 



Wales : — Trefriw ! Gimlet Kock ! Pwlhelli (on grass), Dolgelley ! 



"Spores .007—11 mm. long, .0035— .0045 mm. broad.'' (Nyl.) "Spores 

 .006—10 mm. long, .002—4 mm. broad." (T. M. Fr.) " Spores .00175— .00225 

 in. long, .00075 in. broad." (Mudd.) Spores .006 — 9 mm. long, .002—3 mm. 

 broad. 



209. L. coracina, Ach. nigricant or cinereo-nigricant, areolato- 

 rimoso-diffract, areolce small, plane or convex, smooth, (K yellow 

 then red) ; hypothallus very black; apothecia produced from the 

 hypothallus, small, innate or adpressed, very black, plane or 

 convex, margin thin, entire ; hypothecium thick, black ; thalamium 

 pellucid ; paraphyses cohserent, apices nigricant ; spores 8, 



• fusco-nigricant, ellipsoid, 1-septate; gelatina hymenea intense- 

 blue with iodine. 



On alpine rocks, rare. 1808. 



Stn :— Ach. Syn. 11. pro. p. (1817.) Smmrf. Lapp. 142. Nyl. Scand. 232. L. 

 aXrata, Sm. E. Bot. 2335. Mudd Man. 215. 



Fia :— E. Bot. 2335. Mudd t. 4 p. 80. 



Exs :— M. & N. 462. Fellm. 193. Crombie 92. Am. 633. 



Geog. Distrib : — Norway, Lapland. 



Bot. Prov :— 7. ..10.. .15. 



England : — Near Easeby, Cleveland. Mr. Mudd. Staveley. Mr. Martindale. 



Scotland : — Head of Lochlee in Glen Esk, Angus. Mr. G. Don. (1808.) 

 Cairngorm ! herb. Borrer. Morrone. Adm. Jones. 



W 



