264 C. D. Sherbakoff 



The greatest septation observed was in a culture fifteen days old on oat 

 grains. This was a 9-septate conidium measuring 39 x 5.2/x. 



Average of the above measurements: 

 Conidia: 0-septate, about 4 per cent, 16 x 4.7 n 



1-septate, about 6 per cent, 21 x 4.7/x 



2-septate, about 5 per cent, 25 x 5.3/x 



3-septate, about 78 per cent, 33.3 x 5/j. 



4-septate, about 4.5 per cent, 39 x 5.26/* 



5-septate, about 2 per cent, 55 x 5.5ju 



6- and 7-septate, about 0.5 per cent, 58 x 5.6/t 

 Appel and Wollenweber's measurements for 3-septate conidia average 

 36 x 5.25 (31-40 x 4.5-5.5)/t 



RAMULARIA (Unger) Fries (Fig. 1, a to c) 

 Unger, F., Exantheme der Pflanzen, page 169. 1833. Fries, E. M., 

 Summa vegetabilium Scandinaviae, page 493. 1849. 

 Cf. Wollenweber, H. W., Phytopath. 3 : 33. 1913. Wol- 

 lenweber, H. W., Phytopath. 3 : 207-211. 1913. 



Differs from Fusarium mainly by nearly cylindrical, 

 apedicellate conidia, with rounded apex; plectenchymic 

 stromata flat to well-developed, wartlike, short 

 column-like structures typically present; conidia borne 

 on conidiophores on aerial mycelium, or on plecten- 

 chymic substratum; microconidia (that is, a distinct, 



Fig. 49 .—Ramularia abbreviated type of conidia) absent. 

 eudidyma. a, Co- 

 nidia from aerial 1. Ramularia eudidyma Wr. (Figs. 1b and 49) 



2S3T.& • Wollenweber, H. W., Phytopath. 3 : 221-222, PI. xxt, 



red raspberry cane fig. c. 1913. 



plug; b, sporodo- 



chial conidia from s y n - Fusisponum didymum Hartig. 1846. 



153-days-old cul- Fusarium didymum (Hart.) Lindau. 1909. 



lure on hard lima- Fusarium didymum (Hart.) Ap. et Wr. 1910. 



bean aqar- c co- Ramularia didyma (Hart.) Wr. 1913. 



nidia from aerial . , ,. . . , . . , , . , . 



mycelium from 25- Conidia nearly cylindrical, with both ends rounded 

 days-old culture on or basal ends sometimes papillate, mostly 1-septate, 

 hard 1 potatTaglr* 23x4.87 (21-26 x 4.7-5)/* ; 58 0- to 2-septate conidia 



58 According to Wollenweber's data (1913 c: 234) the average size of 1-septate conidia is 26.4x5(21- 

 29 x 4.25-5.5)/i. 



