252 C. D. Sherbakoff 



in upper half of their length, with from rounded to slightly constricted 

 apex, not at all or slightly pedicellate, typically 3-septate, 29.75 x 5.5 

 (27-34.7 x 5.4-5.8) m, sometimes 4-septate, rarely 5-septate; aerial myce- 

 lium from poorly to well developed, from white to olive-buff; substratum, 

 on potato agar rich in glucose, olive-buff with a green-blue tinge (PL i, 

 fig, 1, and PL vi, fig. 7). 



Hab. On Solatium tuberosum and other substrata, in Europe and America; 

 often in association with other Fusaria. 



The organism was often isolated by the writer from rotted potato tubers 

 received from various States. 



Measurements of conidia on various media are as follows: 



On slightly acidified hard potato agar, culture eleven days old; conidia 



from pseudopionnotes: 



Conidia: 1-septate, 0.5 per cent, 14x4 (13-17 x 3.5-5.8)/x 

 2-septate, 1 per cent, 22 x 4.5 (17-28 x 4.2-4.8)/* 

 3-septate, 93 per cent, 34.7 x 5.4 (22^2 x 4.3-6.1)/* 

 4-septate, 5 per cent, 38 x 5.8 (30-43 x 5-6.4)/* 

 5-septate, 0.5 per cent, 44.3 x 5.8 (38^7 x 5-6.4)/* 



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



dochium : 



Conidia: 0-septate, rare, 8.7 x 4/x (only a few measured) 

 1-septate, 2 per cent, 20 x 4.6/* 

 2-septate, 4 per cent, 23x4.7 (18-25 x 4.4-5.4) /* 

 3-septate, 93 per cent, 28 x 5.8 (22-35 x 4.8-6. 1)/* 

 4-septate, 1 per cent, 33-5.9 (28-38 x 5.4-6.1) a* 



On hard lima-bean agar, culture twelve days old: 



(1) Conidia from aerial mycelium 

 Conidia: 0-septate, 20 per cent 



1-septate, 40 per cent 

 2-septate, 19 per cent 

 3-septate, 21 per cent, 27 x 5.4 (24-37 x 4.7-6) /* 



(2) Conidia from a sporodochium 

 Conidia: 0-septate, 1 per cent 



1-septate, 1 per cent 

 2-septate, 1 per cent 

 3-septate (97 to 100 per cent), 29.3 x 5.4 (24-35 x 4.8-5.9) /* 



