XOETH AMERICAN CERCOSPOE^E 



19 



X 4 /'•. Conidia slender, attenuated above, 8—10 septate, 80—112 x 4 /^-. 

 AmpliigenoLis, but more perfectly daveloped on the lower surface of the 

 leaf. 



On leaves of Phytolacca decandm^ from various localities. 



2. Cercospora Diantherje, E. & K., Jour, of Mycol., I. p. 2. 



On round, white spots (2 — 4 mm.) and mostly included in or sur- 

 rounded by brown, dead areas of the leaf which again are either indefi- 

 nitely limited or are bounded by a definite, darker, narrow border. Tufts 

 small, loose, spreading, of only a few threads each (3—12), on the white 

 spots. Hyphae brown, continuous or sparingly and faintly septate, gen- 

 iculate and toothed above, 60—80 x 4 Conidia slender, linear oblanceo- 

 late, 80—120 x 4—5 /^-, multiseptate, hyaline. Allied to the preceding. 



On leaves of Dianthera Americana, Sept., Kansas (Kellerman.) 



3. Cercospora Yiol^, Sacc, F. Yen. nov. vel. crit., Y p. 187. 

 Spots suborbicular, dry and pale. Hyphse amphigenous, short, sim- 

 ple, fuscous, 80—35 X 4 Conidia very long, 150—200 x Si wand- 

 shaped, multiseptate, hyaline. 



On leaves of Yiolet, ^August, N". Y. (Peck), Iowa (Holway.) 



4. Cercospora Chenopodti, Fres. Beitrag. p. 92. Michelia, vol. II., 

 p. 364. Exsiccati, de Thum, M. U., No. 374. Eav. Fungi Amer., 591. 

 Ellis N. A. F., 550. 



Hyphae amphigenous, fasciculate, simple or 1-septate, 40 — 50 x 5 — 6 /^-, 

 browm. Conidia subcylindrical, ends subobtuse, slightly curved, 60 — 70 

 x 6 — 8 /->■, 4—5 septate, with a brownish shade, on pale, thin, light-colored 

 spots i — h cm. 



On leaves of G. album and probably other species of Chenopodium. 

 Common. 



5. Cercospora Plantaginis, Sacc, Mich. I., p. 267. 



Spots small (1 — 2 mm.) round, white, thin with a narrow, reddish 

 brown border. Ilyphse fasciculate, brown, septate, 40—60 x 3 forming 

 minute tufts. Conidia slender, obclavate, acute above, multiseptate, 

 hyaline, 80—200 x 3—4 



On leaves of Plantago lanceolata, Xewfield, N". J., and also on P. 

 major, KsLUsas (Kellerman.) 



6. Cercospora Physaltdis, Ell. Am., Nat., Oct. '82, p. 810. 

 Amphigenous ; on white, round, deciduous spots, (1 — 3 mm. ) 



Hyphae fasciculate, brown, subnodulose, 45—55 x 5— 5i /^-. Conidia clavate, 

 cylindrical, faintly 5—8 septate, hyaline, 65—75 x 4 /->-. 



On leaves of several species of Physalis. From Kentucky and Kan- 

 sas (Kellerman), to Wisconsin (Trelease). 



7. Cercospora Euoxymi, Ell. 1. c. N. A. F. 1245. 

 Amphigenous; on small, round, white spots (1 — 2 mm.) with a dark 



purple border. Hyphae fasciculate, subnodulose, brown, about 60;^- high. 

 Conidia obclavate-cylindrical, 3—5 septate, hyaline, 50—65 x 7—8 /J-. 



On leaves of JEiionymus Americanus and E. Eiiropceus, Ky. ( Kellerman 



