FusARiA OF Potatoes 163 



Latin description. — Conidiis ex arthrosporialibus (brevibus, falci- 

 formibus, atque, si 3-septata et in aerio mycelio, plerumque 28x4.3ju), 

 falciformibus plerumque 5-septatis, 48.5 x 3.63 (41-61 x 2.9-4.4) /x in 

 sporodochiis pseudopionnotibusque; in pseudopionnotibus, conidiis 6-9- 

 septatis frequentibus, 60-100 x 4.7-5.2/;i, parum curvatis rectis, demum 

 anguiformibus, apice acutis, distincte sed non insignite pedicellatis, in 

 totum typice pallide "pinkish cinnamon" (R); nullis chlamydosporis; 

 sporodochiis, si exstant, saepe magnis (usque ad 3.7 cm. diam.); aerio 

 myceHo typice plene maturo, uniformi mediocri subtilitate, albo; 

 substrato — in Solani tuberosi agare perglucoso — in culturis juvenibus, 

 "onion-skin pink" (R) vel "clay-color" (R), in culturis maturis 

 "Saccardo's amber" (R). 



Hab. In tuberibus putridis Solani tuberosi una cum F. metacroo, New 

 York, Amer. bor. 



Measurements of conidia from cultures on different media are as 

 follows : 



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



from thin pseudopionnotes : 



Conidia: 0-septate, rare 



1-septate, 7 per cent, 10 x 2.4^c 



2-septate, 1 per cent, 20 x 2.9/x 



3-septate, 36 per cent, 36 x 3.1 (29-46 x 2.9-3.5)/x 



4-septate, 20 per cent, 49 x 3.15 (40-53 x 3-4)^ 



5-septate, 35 per cent, 60 x 3.8 (50-70 x 3.5-4.2) ju 



6- to 9-septate, 1 per cent (60-100 x 4-5iu) 



On red raspberry cane plug, culture seventy-six days old; conidia from 



a small sporodochium : 



Conidia: 3-septate, 57 per cent, 40 x 2.7(32-45 x 2.4-3) /x 

 4-septate, 28 per cent, 45 x 2.9(42-52 x 2.6-3.2) /x 

 5-septate, 15 per cent, 50 x 2.9(43-54 x 2.7-3.2)m 



On hard lima-bean agar, culture eight days old; conidia from a thin 

 layer near substratum: 

 Conidia: 1-septate, 2 per cent 



2-septate, 1 per cent 



3-septate, 32 per cent, 37 x 3.9 (28-43 x 3.5-5.3) /x 



4-septate, 9 per cent 



