FUMAGO CERATOSPORIUM. 437 



fusoid or clavate, muriformly septate, olive-green, 50-85 x 



12-18 p. 



Alternaria brassicae, Sacc., Syll., iv. n. 2613, 

 On dry spots on the leaves of Brassica oleracea. 



FUMAGO. Pers. (fig. 32, p. 397.) 



Hyphae decumbent, intricately wefted, often moniliform 

 and muriformly divided, usually forming black crust-like 

 patches that fall away when dry; fertile hyphae erect, 

 branched, conidia elliptical, oblong, or deformed, 1-2-septate, 

 typically produced in chains. 



Fumago, Persoon, Myc. Eur., i. p. 9 ; Sacc., Syll., iv. 

 p. 547. 



Forming black, sooty, crust-like patches on living leaves 

 and stems. 



Probably nothing more than a stage of development of the 

 genus Capnodium. 



Fumago vagans. Pers. (fig. 32, p. 397.) 



Sterile creeping hyphae vaguely branched, free or more 

 or less fasciculate, often confluent in cellular muraliform or 

 multicellular masses, olive or smoky-brown ; fertile hyphae 

 ascending, short, corymbosely branched above ; conidia formed 

 at the tips of the branches, shortly catenulate, generally 

 2-celled, rarely continuous or 2-septate, 6-18 p long. 



Fumago vagans, Pers., Myc. Eur., i. p. 9 ; Sacc., Syll., iv. 

 n. 2618. 



Forming sooty patches on living leaves of various trees. 



Very variable, and undoubtedly the conidial phase of 

 Capnodium. 



Sect. V. STAUKOSPOKAE. Sacc. 

 CEKATOSPOEIUM. Schw. (fig. 12, p. 397.) 



Sterile hyphae slender, creeping ; conidia sessile, attached 

 to each other in small clusters at the base, ascending, rigid, 

 many-septate, brown. 



Ceratosporium, Schweinitz, Syn. Amer. Bor., t. 19, f. 3; 

 Sacc., Syll., iv. p. 552. 



