254 CD. Sherbakoff 



On potato tuber plug, culture sixty-five days old; conidia from a sporo- 

 dochium: 



Conidia: 0-septate, few 



1-septate, 12 per cent, about 22 x b/j. (only one measured) 

 2-septate, 16 per cent, about 27 x 5.3yu (only one measured) 

 3-septate, 72 per cent, 29 x 5.6 (24-35 x 4.8-5.9)^ 



On corn agar, culture one hundred and seventy-five days old; conidia 

 only few, chlamydospores nmnerous, terminal and intercalary: 



Chlamj'dospores : 0-septate, in mycelium, 11.3 x 9.3 (8.5-16 x 7.5-1 l)ju 

 1-septate, in mycefium, 16.3 x 9.9 (14-20 x 8-14) ^ 



On hard lima-bean agar, culture twelve daj^s old; conidia from pseudo- 

 pionnotes : 



Conidia: 0-septate, 4 per cent 1 (percentage may vary considerably 

 1-septate, 15 per cent > from somewhat greater than figures 

 2-septate, 16 per cent J given here to nearly zero) 

 3-septate, 65 per cent, 33 x 5.2 (27-37 x 4.7-5.6) /z 



Average of the above measurements: 



Conidia: 0-septate, 9 per cent, 12 x 3.7ju 



1-septate, 15 per cent, 23 x 4.75/1 

 2-septate, 18 per cent, 27 x 5.3ju 

 3-septate, 57.5 per cent, 30.5 x 5.5/i 

 4-septate, 0.5 per cent, 35 x 5.5n 



58. Fusarium Solani (Mart. p. par.) Ap. et Wr. var. suffuscum n. 

 var. (Fig. 45, k to t) 



Differs from F. Solani and F. Solani var. cyanum mainly by typically 

 well-developed, uniform, fine, aerial mycelium, with mass of chlam3^do- 

 spores at maturity which gives it a pale brownish tint; by sparse conidial 

 production on aerial mj^cehum; and by the fact that sporodochia ai-e usually 

 few and distant from one another. 



Hab. On rotted tubers of Solanum tuhero&um, Wisconsin. 



