236 C. D. Sherbakoff 



On hard lima-bean agar, culture nine clays old; conidia from aerial myce- 

 lium close to substratum: 

 Conidia: 1-septate, very rare 

 2-septate, very rare 



3-septate, 33 per cent, 30 x 4.6 (19-34 x 4.3-4.8)/* 



4-septate, 23 per cent 



5-septate, 44 per cent. 36 xo (33-40 x 4.6-5.4) m 



On same medium as above, culture fifteen days old; conidia from 

 pseudopionnotes : 

 Conidia: 2-septate, very rare 



3-septate, 36 per cent, 33 x 5 (22-39 x 4.6-5.3) /i 



4-septate, 22 per cent 



5-septate, 42 per cent, 36.5 x 5.1 (33-41 x 4.9-5.3)/u 



Average of the above measurements: 

 Conidia: 1-septate, rare, 16x4.4^ 

 2-septate, very rare 

 3-septate, 43 per cent, 28.5 x 4.75^ 

 4-septate, 15 per cent 

 5-septate, 42 per cent, 36.2 x 5.05/j 



48. Fusarium discolor Ap. et Wr. (Fig. lch and 41; PI. iv, fig. 4; PI. v, 

 fig. 11) 



Appel, 0. and "Wollenweber, H. W., Arb. K. biol. Anst. Land- u. 

 Forstw. 8:108-115; PI. i, figs. 50 to 59; PI. in, fig. 7. 1910. 



Conidia for greater part of their length of nearly even diameter, sickle- 

 shaped, gradually attenuated, often somewhat suddenly constricted at 

 the apex, pedicellate, mostly 3- to 5-septate, 5-septate measuring 38.7 x 

 5.1* (35-40 x 4.6-5. I)/*, 54 on aerial mycelium, in pseudopionnotes, and in 

 plectenchymic sporodochia; chlamydospores scant, not in long chains; 

 aerial mycelium from poorly to well developed, from pale pink-buff to 

 ochraceous orange and Eugenia red; color of substratum, on agars rich 

 in glucose, from pale salmon at an early stage and warm sepia in old cul- 

 tures to tyrian and ox blood; color of conidia mostly from light ochraceous 

 salmon to ochraceous buff. 



" Size of 5-septate conidia according to Wollenweber's data (see Appel and Wollenweber 1910 : 111-112) 

 is 36 x 5.1 (29-39 x 4.5-5.5) p. The writer's measurements were taken from cultures of the same organ- 

 ism. Average size of F. discolor strain isolated in United States is, for 3-septate conidia, 30.2 x 4.4m 

 (from 25 to 98 per cent), and for 5-septate conidia, 3S.4 x 4.85 (33.5-44 x 4.5-5) ^ (from to 53 per cent). 



