DEMATIACEAE 



217 



(s) Conidia elongate, typically 

 many-septate 

 (y) Biogenous 

 m. Hyphae creeping 

 (m) Hyphae radiate, without setae; 



conidia ellipsoid 

 (n) Hyphae not radiate, with setae 

 r. Hyphae with hyphopodia; conidia 



long-rostellate 

 s. Hyphae without hyphopodia; co- 

 nidia long, not rostellate 

 n. Hyphae erect, fasciculate; conidia 

 ovoid 



Helminthosporium 4:402; 56 



Ophiotrichum 10:617 



Chiropodium 

 Chaetotrichum 

 Cercosporidium 18:594 



Dictyosporae 



4:496, 10:665, 11:632, 14:1090, 16:1075, 18:612, 22:1399 



Conidia muriform, dark, rarely hyaline, globose to oblong 



Micronemeae 

 Hyphae very short or scarcely diflferent from the conidia 



A. Conidia catenate 



B. Conidia not catenate 



1. Conidia 3-4-rostrate at apex 



2. Conidia not rostrate 



a. Conidia composed of parallel chains of cells 



(1) Chains never separating 



(2) Chains separating 



b. Conidia irregularly muriform or sarciniform 



(1) Conidia -with a conic point at each side 



(2) Conidia muticate 



(a) Conidia sarciniform, irregular, often 



coalescent 



(b) Conidia globose to oblong 



X. Conidia globose-ovoid, aggregated, on 



ramose hyphae 

 y. Conidia ovoid-oblong, single, on short 



simple hyphae 



Sirodesmium 4:516; 56 

 Tetraploa 4:516 



Dictyosporium 4:513; 56 

 Spira 4:514 



Oncopodium 18:616 



Coniothecium 4:508 



Stigmella 4:507 

 Sporodesmium 4:497; 56 



Macronemeae 

 Hyphae long or distinctly different from the conidia 



A. Conidia of two kinds, dark sarciniform and sub- 



hyaline falcate 



B. Conidia alike 



1. Conidia catenate 



a. Conidia connected by isthmi, then caudate; 



hyphae velvety, subsimple 



b. Conidia without isthmi, not caudate; hyphae 



crustose, typically branched 



2. Conidia not catenate 



a. Conidia capitate 



b. Conidia not capitate 



Sarcinella 4:458; 57 



Alternaria 4:545; 57 

 Fumago 4:457 

 Dactylosporium 4:545 



