438 PLANT DISEASES 



100-250 X 5-6 fx ; conidia solitary at the apex of the conidio- 

 phores, elliptical, ends broadly rounded, 3-septate at 

 maturity, slightly constricted at the septa, pale fuliginous, 

 28-30X11-12 /x ; epispore densely and very minutely 

 echinulate under a high power. 



Cercospora, Fresen. — Hyphae somewhat flaccid, simple 

 or slightly branched, fuscous : often growing on living 

 leaves and forming pallid, dry spots ; conidia worm- 

 shaped, olive or subhyaline, multiseptate. 



Cercospora circmnscissa, Sacc, Fu^ig. Ven., ser. v. p. 

 189. — Forming spots on both ^ides of living leaves; spots 

 circular, pallid, dry, the dry portion at length falling out: 

 hyphae fasciculate, nodulose, brownish ; conidia acicular, 

 attenuated towards the apex, septate, tinged brown, 50 x 

 3 "5-4 l^' 



Cercospora apii, Fresen., Beitr., p. 91, pi. xi. figs. 46-54. 

 — Spots subcircular, on both surfaces, pale brown, 4-6 mm. 

 diam., with an irregularly narrow raised margin ; hyphae 

 generally hypophyllous, in minute, brown, gregarious tufts, 

 i-2-septate, subundulate, 40-60 x 4-5 /^ ; conidia slightly 

 obclavate, 3-10-septate, 50-80X4^1, subhyaline. 



Cercospora violae, Sacc, Fung. Ve7i., ser. v. p. 187. — 

 Forming spots on both surfaces of the leaf; spots sub- 

 rotund, dry, pallid; hyphae short, simple, 30-35X4 jj-, 

 fuliginous; conidia very long, 150-200 X 3*5 /x, rod-shaped, 

 suberect, multiarticulate, hyaline. 



Cercospora resedae, Fuckel. — Tufts gregarious, grey, 

 minute, appearing on dry spots on the leaf, 2-4 mm. diam. ; 

 hyphae closely crowded, quite simple, continuous or 



