222 C. D. Sherbakoff 



On same medium as above, culture sixty-five days old: 



(1) Conidia from a sporodochium 

 Conidia: 0-septate, 3 per cent 



1-septate, 1 per cent 



3-septate, 93 per cent, 33.8 x 4.3 (22-42 x 4-4.7)/i 

 4-«eptate, 3 per cent, 35.7 x 4.3 (33-41 x 4. 1-4.7) m 

 5-septate, rare, 35 x 4.4/i (only two measured) 



(2) Chlamydospores, terminal and intercalary, 0-septate dominant 

 Chlamydospores: 0-septate, 8.7 x 8 (7-12.5 x 7-12.5) /x 



1-septate, 15.5 x 9.2 (12-22 x 7.7-14) /x 



Also in short chain, 2- and 3-septate, 2-septate 

 commoner 



On hard oat agar, culture twenty-three days old; conidia from a sporo- 

 dochium : 

 Conidia: 3-septate, 93 per cent, 30 x 4.4 (26-35 x 3.9-4.7) m 



4-septate, 6 per cent, 34.5 x 4.5 (31-39 x 4.2-4.7)yu 



5-septate, 1 per cent 



On corn meal agar, culture one hundred and seventy-three days old; 

 chlamydospores abundant, terminal and intercalary : 

 Chlamydospores: 0-septate, in conidia, 7.2x6.1 (6-9 x 4.8-8) /i 



0-septate, in mycehum, 8.6 x 8 (7-10 x 7-11) fx 



1-septate, often observed 



On hard lima-bean agar, culture fifty days old; chlamydospores inter- 

 calary and terminal, in conidia and in mycelium, the latter most commonly 

 observed : 

 Chlamydospores: 0-septate dominant, 8.9x7.3 (5.2-11x5.2-11)^ 



Average of the above measurements of macroconidia: 

 Conidia: 3-septate, 0-93 per cent, 30.4 x 4.2;u 



4-septate, 0-6 per cent, 36.7x4.43 (34.5-60 x 4.3^.5) )u 

 5-septate, 0-rare, about 35 x 4.4/x 



41. Fusarium oxysporum Schlecht. var. asclerotimn n. var. (Fig. 35, b to j; 

 PI. V, fig. 7) 



Differs from F. oxysporum mainly by absence of sclerotia and of defi- 

 nite plectenchymic sporodochia; differs also in color of mjxelium and in 

 somewhat longer and narrower macroconidia. 



Hab. In rotted tuber of Solanum tuberosum, Atlanta, New York. 



