414 



TBE LlCHEN-FLOfcA 



flexuose, plano-convex, dilated, naked, immarginate, with a pale 

 spurious narrow ihalline margin, internally pale ; spores 8, colour- 

 less, elongato-acicular, 13-septate. 

 On old trees, rare. 



Syn :— Mudd Man. 244. Opegrapha, Sm. E. Bot. 2454. (1812.) Platygramma 

 elaborata, (Lyell Mss. in herb. Borrer.) Leight. Br. Graph. 50. 



Fig :— B. Bot. t. 2454. Leight. Br. Graph, t. 7. f. 27. 



Geog. Distbib :— Europe. 



Bot. Pbov :— 2. ..25. 



England :— New Forest ! Hants. Mr. Lyell. Quarr Abbey Wood ! near 

 Ryde, Isle of Wight. Bev. A. Bloxam. near Brockenhurst in New Forest. Bev. 

 J. M. Crombie. 



Ibbland : — Glenstall co. Tipperary. Mr. Carroll. 



" Spores .007 to .009 in. long, by .00075 in. broad." (Mudd.) Spores .038— 

 .044 mm. long, .003 mm. broad. 



VIII. ARTHONIA, Ach. 



Thallus thin or hypophlseodal and evanescent. Apothecia 

 (ardellae) roundish or difformed, plane or tumid, innately sessile, 

 immarginate ; thalamium sub-gelatinous, without paraphyses ; 

 asci pyriform thickened at the apices ; spores 4-8, colourless, rarely 

 brown, obovate, septate, upper cell larger. Spermatia cylindrical, 

 straight or curved. 



* Spores 1-septate. 



1. A . lurida, Ach. pale-dirty-broum or lead-colour, indeterminate, 

 effuse, smooth, obsolete ; ardellae reddish-black, sessile, appressed, 

 irregularly roundish, slightly convex, dull, internally concolorous ; 

 spores 8, colourless, broadly-obovate, 1-septate, small. 



On trees, fir, holly, oak, not common. 1837. 



Syn:— Ach. L. U. 143. (1810.) Syn. 7. Nyl. Scand. 258. Leight. Br. Graph. 

 57. Mudd Man. 250. 



Fig :— E. Bot. Suppl. 2692. f. 2. Leight. Br. Graph, t. 8. f. 38. 



Exs :— Schasr. 17. Mudd 236. Zw. 86. M. & N. 1325. Th. M. Fries 47. Hepp 

 161. Leight. 17. 



Geog. Distbib : — France, Switzerland, Germany, Russia, Scandinavia. 



Bot. Pbov:— 2...5...7, 8...10...19...31. 



England :— Black Down, Sussex! Mr. Borrer. (1837.) New Forest! Hants. 

 Mr. Lyell. Orton Wood ! Leicestershire. Bev. A. Bloxam. Airyholme Wood ! 

 Cliffrigg ! Newton Wood ! Cleveland. Mr. Mudd. Leigh Woods, Clifton. Mr. 

 La/rbalestier. Chedworth Woods, Gloucestershire. Mr Joshua. Pontesbury ! 

 Bomere Pool ! Sharpstones ! Shropshire. 



Ibeland :— Killarney. Sir T. Gage. ArdtuUy co. Kerry. Dr. Taylor. 



Wales :— Gwydir Woods ! Bettws-y-coed. Trefriw ! Edderton ! Montgomery- 

 shire. 



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



" Spores .0015 to .00175 in. long, by .0005 to .00075 in. broad." (Mudd.) 

 "Spores .011 — 15 mm. long, .004 — 5 mm. broad. Gelatina hymenea I vinous- 

 red." (Nyl.) Spores .009—015 mm. long, .004— .006 mm. broad. 



2. A. vinosa, Leight. brightpale-brown, thin, membranaceous, 

 smooth, sub-determinate ; ardelUe deep-vinous-red, minute, irre- 

 gularly roundish, variable in size, single or confluent, sessile, con- 

 vex, dull, internally concolorous ; spores 8, colourless, obovate, 

 1-septate, double the size of those of A. lurida. 



On oak. 



