238 C. D. Sherbakoff 



On potato tuber plug, culture ninety-nine days old; conidia from a 



sporodochium : 



Conidia: 3-septate, 6 per cent, 26 x 4.7 (22-30 x 4.3-4.8) n 

 4-septate;- 25 per cent, 33 x 5 (28-40 x 4.6-5) n 

 5-septate, 69 per cent, 35 x 5.2 (28-42 x 4.7-5.7) /x 



On hard lima-bean agar with 2 per cent glucose, culture fifty-four days 



old; conidia from a small sporodochium: 



Conidia: 1- to 3-septate, rare 



4-septate, 2 per cent, 36 x 4.9/x (only two measured) 

 5-septate, 98 per cent, 40 x 5.2 (33-44 x 4.6-5.5) M 



On hard lima-bean agar, culture thirty-four days old; conidia from 

 pseudopionnotes : 

 Conidia: 1-septate, very rare 



3-septate, 49 per cent, 33.5x4.8 (24-44 x 4.1-6) n 



4-septate, 31 per cent 



5-septate, 20 per cent, 39.3 x 5.1 (31-47 x 4.6-6.2) M 



Average of the above measurements: 

 Conidia: 1-septate, very rare 

 2-septate, very rare 

 3-septate, 19 per cent, 30.5 x 4.55 fx 

 4-septate, 19 per cent 

 5-septate, 62 per cent, 38.7 x 5.1/u 

 6-septate, very rare, 53 x 5.8/z 



49. Fusarium discolor Ap. et Wr. var. sulphureum (Schlecht.) Ap. et 

 Wr. (PI. iv, fig. 11) 



Cf . Schlechtendal, Fl. Berol. 2 : 134. 1824. Appel, O., and Wollenweber, 

 H. W., Arb. K. biol. Anst. Land- u. Forstw. 8:115-118. 1910. 



Differs from F. discolor by absence of red color in mycelium and sub- 

 stratum, and by entirely exposed pseudopionnotes on various agars, a 

 characteristic culture of which is shown in Plate iv, figure 11. 



Average percentage of different septation types and sizes of conidia on 

 three different media are as follows: 



Conidia: 1-septate, about 0.5 per cent 

 2-septate, very rare 

 3-septate, about 25 per cent, 28.5 x 4.2/z 



