CENAXGIUM. 113 



B. Spores coloured. 



Schweinitzia. Spores continuous. 

 Phaeangella. Spores 1-septate (hyaline in one species). 



CENANGIUM. Fries. 



Ascophores erumpent, becoming superficial, often caes- 

 pitose and springing from a common stroma ; at first closed 

 then becoming urceolate or patellate, coriaceous or somewhat 

 horny, usually scurfy or mealy outside, blackish or brown ; 

 asci 4-8-spored; spores elongated, continuous, hyaline; 

 paraphyses present. 



Pycnidia or spermagonia present in some species. 



Cenangium, Fries, Syst. Myc., ii. p. 180 ; Phil., Brit. Disc., 

 p. 34-i ; Sacc., Syll., viii. p. 556. 



Dermatea, Fries, Summa Veg., p. 362 ; Sacc., Syll., viii. 

 p. 550 ; Phil., Brit. Disc, (in part). 



Pezicula, Sacc., Syll., viii. p. 310 (in part). 



Distinguished by the crowded ascophores, which are 

 frequently scurfy or mealy outside, and the hyaline 

 continuous spores. 



* Growing on Angiosperms. 



Cenangium furfuraceum. De Notaris, Disc., p. 30 ; 

 Rehrn, Krypt.-Flor., Disc., p. 219 ; Sacc., Syll., viii. n. 2331. 



Caespitose or solitary, erumpent, sessile and attached by a 

 narrowed base, rather dry and leathery, at first closed then 

 expanding; margin remaining more or less incurved, entire, 

 disc cinnamon, externally densely covered with rust-coloured 

 scurf or meal; size very variable, |-1| cm. across; 

 hypothecium and excipulum consisting of thick-walled, 

 hyaline, intricately interwoven hyphae, passing into paren- 

 chyma at the cortex, which runs out into irregular clusters 

 of thick-walled, brown, subglobose cells, 10-13 p diameter, 

 forming the scurfy exterior ; asci clavate, apex rather 

 narrowed, running down into a long, slender pedicel, 8- 

 spored; spores irregularly 2-seriate, hyaline, smooth, con- 

 tinuous, cylindric-oblong, ends obtuse, usually slightly 



VOL. rv. i 



