360 



BRITISH DISCOMYCETES. 



2. 



3. 



Margin entire ; sporidia vermiform 



Margin pale ; sporidia clavate or fusiform, medium 



S1Z0 



Margin flexuous ; sporidia minute, elliptic. 

 ' Margin thin, compressed ; sporidia large, 3-septate 

 Margin thin, compressed ; sporidia large, simple 

 Margin serrated; sporidia smaller, simple.. 

 Margin absent . . . . . . . . . . 



Sporidia brown 



Sporidia hyaline ; cups seated on a spot-like crust 



Sporidia hyaline ; cups emerging through the bark 



Margin tumid; sporidia brown 



Margin crenulate ; sporidia hyaline, fusiform, large 



Margin incurved ; sporidia hyaline, slender, small 



Margin entire ; sporidia hyaline, elliptic, minute 



Margin entire; sporidia hyaline, oblong-fusiform, 



very large 



Margin obtuse ; sporidia hyaline, clavate, large 

 Margin vinous-purple ; sporidia hyaline, fusiiorm 

 .Margin absent 



On dead stems of Hi/pericum : sporidia 3-septate 

 On dead oak : sporidia 4 to 5-septate 



vermifera. 



macrospora. 

 flexella. 

 compressa. 

 connivens. 

 rubro-tinyens. 

 2 



Bloxami. 

 Lecideola. 

 subtectum. 

 lignyota.j 

 maura. 

 litoralis. 

 minutissima. 



Loncierse. 



clavispora. 



atro-vinosa. 



4 



Hyper id. 



proximo,. 



A. SPORIDIA ELLIPTIC. 



(a) Coloured, septate. 



1. Patellaria lignyota. Fries. 



Scattered or subgregarious, sessile, when dry horny, 

 when moist softer, applanate, concave, then plane, grow- 

 ing black ; margin tumid, subcrenulate ; hymenium when 

 moist fuliginous ; asci clavate, obtuse ; sporidia 8, oblong- 

 ovoid, brown, 1-septate, 10 x 4/x; paraphyses filiform, 

 adherent. 



Patellaria lignyota Fries, "Sys. Myco.," ii. p. 150; 

 B. and Br., " Ann. Nat. Hist./' No. 579 ; Cooke, " Handbk.," 

 No. 2177. Arthonia melaspermella Nyl. in " Flora," 

 1855 ; Leighton, " Lichen Flora," ed. iii. p. 416. 



Exs. Rabh., " Myco. Eur.," 1152; Phil., " El v. Brit.," 

 No. 146. 



On decorticated wood. 



Cups about J of a line broad. No visible thallus, and 

 much resembling a Lecidea. Opinion will differ as to 

 the alliance of this species, but for the present I prefer 

 bo retain it as a fungus. 



