CENANGIUM. 113 



B. Spores coloured. 

 Schweinitzia. Spores continuous, 

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



CENANGIUM. Fries. 



Ascopliores erumpent, becoming superficial, often caes- 

 pitose and springing from a common stroma ; at first closed 

 then becoming urceolats 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. 



Genangium, Pries, iSyst, Myc, ii. p. 180 ; Phil., Brit. Disc, 

 p. 344 ; Sacc, SylL, viii. p. 556. 



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

 p. 650 ; 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 ; 

 Eehm, 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, -J-l|^ 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 /^ diameter, 

 forming the scurfy exterior; asci clavate, apex rather 

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

 spored; spores irregularly 2-S6riate, hyaline, smooth, con- 

 tinuous, cylindric-oblong, ends obtuse, usually slightly 



VOL. rv. I 



