bs/4 THE FUNGI WHICH CAUSE PLANT DISEASE 



Dematiacese (p. 565) 



Hyphae dark or black, cobwebby, loose, usually rigid, not coher- 

 ing in definite fascicles; conidia typically dark and concolorous, 

 but sometimes the hyphae are dark and conidia clear, or the conidia 

 dark and the hyphae clear. This family parallels the Moniliacese 

 and certain intermediate forms must be sought in both. 



Key to Sections of Dematiacese 



Conidia globose, ovate, oblong or short 

 cylindric 



Conidia continuous 1. Amerosporse, p. 594. 



Conidia 2-celled 2. Didymospors, p. 601. 



Conidia 3 or more-ceUed 3. Phragmosporse, p. 60S. 



Conidia muriform 4. Dictyosporse, p. 615. 



Conidia long, filiform or .vermicular 5. Scolecospors, p. 625. 



Conidia cylindric, spiral or convolute, typi- 

 cally septate 6. Helicosporse. 



Conidia of several stellately grouped cells. . . 7. Staurosporse. 



Dematiacese-Amerosporse 



Conidia continuous, globose to oblong. 



Ket to Subfamilies of Dematiacese-Amerosporae. 



Conidiophores very short, scarcely distin- 

 guishable from the myceUmn 



Conidia borne smgly 1. Coniosporiefle, p. 595. 



Conidia catenulate 2. Tonilese, p. 595. 



Conidia in heads or racemes 3. Echinobotryese. 



Conidiophores manifest and distinct from 

 the mycelium and spores 

 Conidia dark, rarely subhyaline 

 Conidia not in chains 



Conidia capitate 4. Peiiconiee, p. 597. 



Conidia verticillate, or at least lat- 

 eral 5. Anthriniese. 



Conidia borne singly on short 



lateral branches 6. Trichosporiese, p. 598. 



