Otf GREAT BRITAIN 135 



6. P. pulverulenta, (Schreb.) pallido-cinerascent or pale cinereo- 

 rufescent or pale olivaceo-cervine, opake, mborbiculato-stellate, ap- 

 pressed, firm, lacinisB plane, multifid, minutely albo-granuloso- 

 pruinose towards the obtuse crenato-incised apices, under surface 

 nigricanti-fibrillose ; apothecia fuscous, caesio-pruinose, margin tumid, 

 entire, pruinose ; spores 8, fuscous, oblong, 1-septate ; (medulla 

 K — C — ). 



On trees, common. 



Stn :— Schreb. Spioil. 128. (1771.) Aoh. Syn. 214. Nyl. Syn. 419. Mudd Man- 

 ila :— Hffm. PL L. t. 8. f . 2. Hepp Sporen t. 99. f . 874. 



Exs :— M. & N. 162. (in part) Anzi It. S. 122. Schaer. 356. Hepp 874. (in part). 



Geog. Disteib : — Europe, Africa, N. America. 



Bot. Pbov:— 1, 2, 3...5...7...10, 11.. .14, 15... (19— 30.)... 31. 



England : — Northumberland and Durham. Mr. Winch. Devon. Mr. Parfitt. 

 Kelvedon, Essex. Mr Varenne. Midland Counties. Mr. Purton. Guestling, 

 Sussex ; Great Glenham, Suffolk. Rev. E. N. Bloomfield. Bourton-on the- Water. 

 Mr. Joshua. Bovey Tracey ; Bagtor Wood, Ilsington, Devon. Messrs. Jones & 

 Kingston, near Shrewsbury ! and Shropshire ! generally. Moor Park ! Hereford- 

 shire. 



Scotland : — -Common on trees Sir W. J. Booker. Forfarshire. Mr. W, Gar- 

 diner. Braid Hermitage ; Blackford House ; SwanstonWood near Edinburgh. 

 Dr. GreviUe. 



Ireland : — On trees, common. Mr. Carroll. 



Wales : — Bettws-y-coed churchyard ! 



Channel Islands : — Guernsey. Rev. T. Salwep. common on all the Islands. 

 Mr. Larbalestier. 



" Spores .006 to .007 in. long, by .003 to .0035 in. broad." (Mudd.) " Spores 

 .020—36 mm. long, .012—20 mm. broad." (Nyl.) " Spores .020—36 mm. long, 

 .010—12 mm. broad." (T. M. Fr.) 



f. pityrea, (Ach.) thallus thinner, sub-cinerascent, sub-effuse, 

 lacinia shortish, sorediate at the margins, margin of apothecia crenu- 

 late or sorediato-lacerate ; (medulla K — • C — ). 



On trees and walls. 1783. 



Stn :— Ach. Prodr. 123. (1798.) Syn. 201. Nyl. Syn. 420. Mudd Man. 111. 



Pig :— E. Bot. 2064. 



Exs :— M. & N. 352. (in part) Schaer. 487. (in part) Mudd 83. Zw. 186. Arn. 

 256. Hepp 876. Beich. & Schub. 87. 



Geog, Distklb : — Europe. 



Bot. Prov:— 1...3, 4, 5.. .10.. .13.. .15. 



England : — Strumpshaw ; Norfolk and Suffolk. Sir J. E. Smith. Bury. Rev. 

 G. R. Leathes. Oswestry ! Castle Walks ! Ludlow ! Rev. T. Salwey. Cambridge. 

 Mr. Larbalestier. Countess Weir, Devon. Mr. Parfilt. Pophills, Warwickshire. 

 Rev. W. S. Rufford. near Oxford. Mr. Baxter. Oversley, Warwickshire. Mr. 

 Purton. Thame Park ! Tetsworth ! Oxfordshire. Mr. Larbalestier. Yorkshire. 

 Mr. Mudd. 



Scotland : — Glasgow. Dr. Scouler. Marten's Den, Forfarshire. Mr. Groall. 



'•Spores .024—28 mm. long, .015—18 mm. broad." (Nyl.) 



f. angustata, (Hffrn.) smaller, pallido-cinereo-rufescent, lacinice nar- 

 rower, linear, dichotomous. 

 On moss. 1861. 



Syn :— Hffrn. Enum. 77. (1784.) Ach. Syn. 214. Nyl. Syn. 420. Mudd Man. 

 110. 

 Fig :— Hffrn. Enum. 1. 11. f. 2. 

 Exs : — Anzi Langob. 54. 

 Geog. Distrib : — Europe. 

 Bot. Prov :— 5...10. 

 England [—Yorkshire. Mr. Mudd. Bentham, near Cricklade. Mr. W. Joshua. 



