THE FUNGI WHICH CAUSE PLANT DISEASE 577 



Conidia-bearing 



branches ellipsoid 23. Cylindrodendrum. 

 Biogenous 

 Conidia smooth 



Catenulate 24. Ovularia, p. 582. 



Solitary 25. Ovulariopsis, p. 582. 



Conidia densely spiny 26. Ramulaspera. 



Conidia muricate or tuberciilose-stellate 

 Conidia globose 

 Conidia merely muricate 



Hyphse loose, cobwebby 27. Sepedonium. 



Hyphse woven into a subgelatinous 



pellicle 28. Pellicularia, p. 382. 



Conidia setose at apex as well as muri- 

 cate 29. Chsetoconidium. 



Conidia tuberculose-stellate 30. Asterophora. 



Acremonium Link (p. 575) 



HjT)h8e subsimple, procumbent; conidiophores simple, short; 

 conidia solitary, hyaline or light colored, ff \ f f 

 oval to ellipsoid. '' ' ^ ' 



A genus of some ten species. 



An undetermined species is recorded by 

 Humphrey "• ^^^ as causing disease of cucum- 

 bers in Massachusetts. 



Sporotrichum Link (p. 576) 



Fig. 386.— Acremonium. 



Hyphse widely spreading, much branched; After Saccardo. 

 conidiophores simple, short; conidia solitary or in groups on 

 separate sterigmata, ovoid or subglobose. 



Over one hundred twenty-five species are described, most of 

 which are saprophytes. 



S. pose Pk. 



Hyphse creeping, interwoven, branched, continuous or sparingly 

 septate, variable in thickness, 2.5-6 fi, hyaline, forming a loose 

 cottony stratimi; conidia of two kinds; microconidia, globose or 

 broadly ovate, dr-12 fi; macroconidia abundant, elongate elliptic to 

 ovate elliptic, 1 rarely 2-septate, about three or four times as 

 large as the microconidia. 



