416 FUXGUS-FLORA. 



Cercospora ferruginea. Fckl. 



Tufts tkiu, delicate, broadly effused ; hypliae very long, 

 slender, creeping, branched, septate, ferruginous ; conidia 

 variable in length, often very long, elongato-clavate, often 

 curved, 3-7-septate, brown, 40-100 X 6-7 /x. 



Cercospora ferruginea, Fckl., Symb. Myc, p. 354; Sacc, 

 SylL, iv. n. 2138. 



On the under surface of living leaves of Artemisia vulgaris, 

 also on sj^ecies of Erigeron in Canada. 



Cercospora mercurialis. Pass. 



Spots rounded, silvery-white with a fuscous border ; tufts 

 minute, hypophyllous, gregarioup, often occupying the 

 central portion of the spots ; hyphae pale smoky, con- 

 tinuous, contorted, nodulose, short, 20-40 X 5-6 /x ; conidia 

 cylindric rod-shaped, attenuated upwards, 2-7-septate, wall 

 thick, hyaline, 70-80 x 4-6 /x, straight or slightly curved. 



Cercospora mercurialis, Passerini, in j\I. U., n. 783 ; Sacc, 

 SylL, iv. n. 2193. 



On living or fading leaves of Mercurialis perennis. 



** 



In woody Dicofyleclons. 



Cercospora moricola. Cke. 



Hypophyllous ; spots orbicular, reddish-brown ; hyphae 

 fasciculate, short, olive ; conidia attenuated upwards, 3-4- 

 septate, hyaline, 70 x 3 /x. 



Cercospora moricola, Cke., in Pav. Amer. Fung., n. 587 ; 

 Sacc, Syll., iv. n. 2281. 



On leaves of Morus alba and 31. ruhra. 



* 



^** On Monocotyledons. 



Cercospora concentrica. C. & E. 



Spots large, subcircular or elliptical, ferruginous, at 

 length greyish ; hyphae fasciculate, pustulate, arranged 

 concentrically, flexuose, unbranched, continuous or septate, 

 12-20 X 4; conidia cylindrical, thinner towards the tip, 

 straight or curved, 3-5-se23tate, 40-70 x 3-4, reddish-brown 

 at maturity. 



