204 C. D. Sherbakoff 



guiform, usually distinctly pedicellate, mostly 3-septate, 45.64 x 3.52 

 (42-49 x 3.3-3.6)/*, often 0- to 5-septate, sometimes 6- to 8-septate; 

 on various agars usually producing thin pseudopionnotes, otherwise 

 very similar to F. oxysporum. 



Hab. In discolored fibrovascular bundles of tubers of Solarium tube- 

 rosum, Ithaca, New York. 



Latin description. — Conidiis gradatim in apicem acutis, paulum cur- 

 vatis vel prope rectis anguiformibusque, plerumque distincte pedicel- 

 latis, plerumque 3-septatis, 45.64x3.52 (42-49 x 3.3-3. 6)/*, saepe 0-5- 

 septatis, interdum 6-8-septatis ; in variis agaribus tenues pseudopionnotes 

 plerumque exhibentibus, aliter simillimis F. oxysporo. 



Hab. In tuberum fasciculis decoloratis fibro-vascularibusque Solani 

 tuberosi, Ithaca, New York, Amer. bor. 



Measurements of conidia on different media are as follows: 



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



from pseudopionnotes : 



Conidia: 0-septate, 6 per cent, 12 x 2.5 (8-18 x 1.8-3.5)/* 



1-septate, 7 per cent, 32 x 2.9 (19-52 x 2.5-4.2)/* 

 2-septate, 2 per cent, 32 x 2.7 (30-39 x 2.5-3)/* 

 3-septate, 44 per cent, 42.2 x 3.3 (31-69 x 2.5-4.4)/* 

 4-septate, 13 per cent, 60.4 x 3.8 (47-70 x 3.5-4.4)/* 

 5-septate, 27 per cent, 63 x 3.9 (43-81 x 3.5-4.1)/* 

 6- to 8-septate, 1 per cent, 90 x 4.1 (80-102 x 4-4.4)/* 



On red raspberry cane plug, culture seventy-four days old : 

 Conidia: 0-septate, 90 per cent 

 1-septate, 7 per cent 

 3-septate, 3 per cent, 39.4 x 3.81 (30-50 x 3-4.8)/* 



On hard lima-bean agar with 2 per cent glucose, culture nine days old; 

 conidia from pseudopionnotes: 

 Conidia: 0-septate, 54 per cent, 10 x 2.8 (5-15 x 2.7-3.1)/* 



1-septate, 7 per cent, 18 x 2.9 (15-22 x 2.7-3.1)/* 



2-septate, 3 per cent 



3-septate, 20 per cent, 43 x 3.6 (29-53 x 3-4.1)/* 



4-septate, 8 per cent 



5-septate, 8 per cent," 59 x 4.5 (52-70 x 3.9-4.8)/* 



6-septate, few, 70 x 4.7/* (only one measured) 



