FusAEiA OF Potatoes 233 



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

 dochium : 

 Conidia: 5-septate, 100 per cent, 32.5 x 5.4 (24-35 x 5.2-5.7)^ 



Average of the above measurements: 

 Conidia : 0- to 2-septate, rare 



3-septate, 19 per cent, 24.5 x 5.2/x 

 4-septate, 15 per cent, 25.6 x 5.5ju 

 5-septate, 66 per cent, 29.1 x 5.53^1 

 6- and 7-septate, very rare, 31 x 6.1^ 



46. Fusarium suhpalUdum var. roseum n. var. (Fig. 1, Si and Ti; PI. iv, 

 fig. 3) 



Differs from F. suhpalUdum by lower septation of conidia, the majority 

 being 3-septate, 25.25x4.9 (22.5-27 x 4.7-5) ^t, and by a tint or shade 

 of from Tyrian rose to pomegranate purple in substratum on agars rich 

 in glucose. 



Hab. On rotted tubers of Solanum tuberosum, Kentucky. 



Measurements of conidia on different media are as follows: 



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



from pseudopionnotes : 



Conidia: 0-septate, few 



1-septate, 1 per cent, 17.5 x 4.7 (10-18 x 4.7);u 

 2-septate, 1 per cent 



3-septate, 44 per cent, 24.5 x 4.8 (18-29 x 4.7-5.3)^ 

 4-septate, 35 per cent, 27 x 4.9 (24-30 x 4.7-5.3) /x 

 5-septate, 19 per cent, 29 x"5.3 (24-32 x 4.7-5.7) m 



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



from a sporodochium : 



Conidia: 0-septate, exceptional 



1-septate 1 f 12 x 4.1 (10-14 x 3.8-4.4) ^ 



2-septate / \ 23 x 4.8/i (only a few measured) 



3-septate, 34 per cent, 26 x 5 (21-28 x 4.7-5.3) m 

 4-septate, 35 per cent, 28 x 5.3 (23-30 x 4.8-5.7) /z 

 5-septate, 30 per cent, 30 x 5.3 (24-33 x 5-5.7) /x 



