DEMATIACEAE 



209 



(2)- Conidia not ciliate, 3-radiate; rays 4-5-sep- 

 tate 

 b. Conidia radiate-sarciniform, a central cell 

 with an enclosing circle of 5-6 others 



(1) Conidia with 3 long setae from the base 



of the central cell; marginal cells 5, all 

 in one plane 



(2) Conidia not setulose; marginal cells 6; 



central cell larger, colored; lobes in 3 

 planes 



Trinacrium 4:231 



Aorate 



Stephanoma 4:753, 11:608 



Helicosporae 



4:233, 10:568, 11:608, 22:1332 

 Conidia spirally curved, hyaline or bright-colored, cylindric 



A. Conidia catenate; conidiophores and chains 



ramose 



B. Conidia not catenate 



1. Conidia concentrically coiled 



2. Conidia spirally twisted into a conic or ovoid 



tube Helicoum 11:609 



Helicodendrum 

 Helicomyces 4:233; 54 



Family 86. DEMATIACEAE 



Hyphae typically dark, olive to brown or black, rarely hyaline but the conidia 

 then dark, loose and byssoid, more or less rigid, rarely fasciculate; sterile and 

 fertile hyphae or conidiophores both present as a rule, the latter differentiated by 

 means of vesicles, whorls, basidia, sterigmata, etc.; conidia typically dark, but some- 

 times hyaline. 



Amerosporae 



2:235, 10:569, 11:610, 14:1068, 16:1059, 18:563, 22:1337 



Conidia 1-celled, dark, or sometimes hyaline but the hyphae then dark, 



globose to oblong 



Micronemeae 



Hyphae very short or scarcely different from the conidia 



A. Conidia catenate 



1. Conidia of two sorts, the larger catenate, the 



smaller glomerate 



2. Conidia alike 



a. Hyphae dark 



(1) Conidial chains breaking up readily 



(a) Conidia globose to oblong 



(b) Conidia clavate 



(2) Conidial chains breaking with difficulty or 



not at all 



(a) Chains curved 



(b) Chains straight or nearly so 



b. Hyphae hyaline 



B. Conidia not catenate 



1. Conidia in heads or racemes, piriform to 

 lageniform 



Heterobotrys 4:267 



Torula 4:247; 55 

 Gongromeriza 4:263 



Gyroceras 4:266 

 Hormiscium 4:263 

 Torulina 18:566 



Echinobotryum 4:268; 55 



