1008 Walter H. Burkholder 



to a pale olive-buff or cinnabar-green (on potato agar), to a zinc-green 

 and dusky green-blue (on potato plug), to a purple-drab (on steamed 

 rice). Spores in mass frequently yellowish. Chlamydospores terminal 

 or intercalary, single or in short chains (11.6 /j. in diameter). 



CULTURAL CHARACTERS 



In growing the fungus on various media, a marked variation in its 

 microscopical appearance is seldom found. The intensity of color pro- 

 duction, however, varies considerably, not only on different media but 

 on the same medium with the presence or the absence of air. The 

 colors, when produced, are of various shades of blue and green. The 

 spore mass frequently has a yellowish appearance. The growth of 

 Fusarium martii phaseoli on steamed rice differs greatly from that on any 

 other medium used. The fungus on rice is purple-drab but the medium 

 itself is colored a coral pink. Microscopically also there is a great change. 

 The spores are very abnormal and a great number of microconidia are 

 produced. On cellulose agar the fungous growth is very scanty and there 

 is scarcely any digestion of the cellulose. 



The proportion of conidium types (those bearing the same septations) 

 and the conidium measurements do not vary greatly on the different 

 agars and on sterilized vegetables. For making the measurements, the 

 fungus was grown on six different media. In the majority of cases the 

 media were the same as those used by Sherbakoff (1915 b) in his study of 

 Fusarium martii Ap. and Wr. The age of the cultures also was similar; 

 in most cases they were in a state of maturity. One hundred conidia 

 taken at random were measured in each case. Types that occurred 

 in a culture but were not found when measuring the spores were marked 

 "rare." It was considered that such types were present in less than one 

 per cent. 



The measurements of the conidia were as follows: 



On bean plugs, cultures eighty-three days old; conidia taken from 

 pseudopionnotes : 



Conidia: 3-septate, 38 per cent, 41.4 x 4.9 (37.7-46.5 x 3.9-5.8) /u 

 4-septate, 62 per cent, 47 x 5 (40.3-53.3 x 4.5-5.8) n 

 5-septate, rare 



