592 THE FUNGI WHICH CAUSE PLANT DISEASE 



P. oiyzse; but morphological characters and inoculation experi- 

 ments indicate their identity on various other grasses. 



P. caudata A. & S. occurs on cacao. 



To the Moniliacese-scolecosporae belongs only one genus: 



Cercosporella Saccardo 



Hyaline throughout; conidiophores simple or branched; conidia 

 filiform, many-septate. Distinguished from Cercospora only in 

 color. The genus contains some seventy species 

 of parasites. 



C. persicae Sacc."* 



Conidiophores cespitose, on discolored areas, 

 filiform, 2 to 3-branched, continuous; conidia 

 40-60 X 1-5 n, torulose. 



The conidia develop in abundance on the 

 lower sides of leaf spots of peach causing a 

 frosty mildew. 



C. narcissi Boud. occurs on Narcissus; 

 C. inconspicuus (Wint. & Hohn) on lily, 

 ^^c.iwf-ji^ Q pastinacae Karst. 



Fig. 397.— c. per- Spots amphigenous, fuscus or whitish; conidia 



f^'o. ^*^'^ ^^^ filiform, somewhat curved, slender, attenuate, 

 50-90 X 2 n. 



On parsnip and other Umbelliferae. 



C. albo-maculans E. & E. 



Spots orbicular, white, dark-margined, conidiophores amphige- 

 nous, cespitose, 8-12 x 2 ju, hyaline, continuous; conidia cylindric, 

 40-68 X 2-2.5 n, straight or curved, 3-septate. 



A common cause of pale spots on turnip leaves. 



Moniliaceae-Dictyosporese (p. 565) 



Conidia hyaline or bright colored, muriform, globose, ovoid 

 or cubic. 



Key to Genera of Momliaceae-Dictyosporese 

 Saprophytic 

 HyphsB much-branched; conidia elliptic 



or globose, cells uniform 1. Stemphyliopsis. 



