242 CD. Sherbakoff 



(2) Conidia from aerial mycelium 

 Conidia: 3-septate, 60 per cent, 30 x 4.7 (19-39 x 4.1-5.9)/* 

 4-septate, 25 per cent, 37 x 5 (31-42 x 4.4-5.9) /x 

 5-septate, 15 per cent, 39 x 5.3 (35-43 x 5.2-5.9)/i 



On hard lima-bean agar with 2 per cent glucose, culture one hundred 

 and fifty-four days old; conidia from pseudopionnotes : 

 Conidia: 0-septate, rare, 8x4/i (only a few measured) 



1-septate, rare, 12 x 3.7/t (only a few measured) 



2-septate, rare 



3-septate, 3 per cent, 26 x 4.7 (17-34 x 4.1-5.5)/z 



4-septate, 7 per cent 



5-septate, 89 per cent, 38 x 5.7 (33-47 x 5.2-6\l)/i 



6-septate, 1 per cent, 49 x 5.7/* (only a few measured) 



7-septate, very rare, 56 x 6.1// (only a few measured) 



Average of the above measurements: 

 Conidia: 0-septate, very rare, 8 x 4/t 



1-septate, very rare, 12 x 37/t 



2-septate, very rare 



3-septate, 18 per cent, 29.67 x 5.1/* 



4-septate, 13 per cent 



5-septate, 69 per cent, 38.5 x 5.85/t 



6-septate, few, 49 x 5.7/z 



7-septate, exceptional, 56 x 6.1/t 



52. Fusarium culmorum (W. Smith) Sacc. var. leteius n. var. (Figs. 1d 2 

 and 43; PI. iv, figs. 1, 2, 10; PI. v, fig. 9) 



Differs from F. culmorum mainly by somewhat comma-like conidia 

 from aerial mycelium, by typical presence of medium large (up to from 

 3 to 5 millimeters in diameter) sporodochia, and by somewhat broader 

 average size of conidia. 



Hab. On rotted tubers of Solanum tuberosum, Atlanta and Forks, 

 New York. 



Measurements of conidia on different media are as follows: 



