416 FUN'GUS-FLOEA. 



Cercospora ferruginea. Fckl. 



Tufts thin, delicate, iDioadly effused ; hyphae very loBg, 

 slender, creeping, branolied, septate, ferruginous ; conidia 

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

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



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

 SyU., iv. n. 2138. 



On the under surface of living leaves of Artemisia vulgaris, 

 also on species of Erigeron in Canada. 



Cercospora mercurialis. Pass. 



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

 minute, hypophyllous, gregarious, often occupying the 

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

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

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

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



Cercospora mercurialis, Passerini, in M. U., n. 783 ; Sacc, 

 Syll., iv. n. 2193. 



On living or fading leaves of Mercurialis perennis. 



** In woody Dicotyledons. 



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 Eav. Amer. Fung., n. 587 j 

 Sacc, Syll., iv. n. 2281. 



On leaves of Moms alba and M. rubra. 



*** On Monocotyledons. 



Cercospora concentrica. C. & E. 

 Spots large, subcircular or elliptical, ferruginous, at 

 length greyish; hyphae fasciculate, pustulate, arranged 

 concentrically, flexuose, unbranohed, continuous or septate, 

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

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

 at maturity. 



