Fusaria of Potatoes 193 



5-septate, 80 per cent, 53x4.2 (50-58x4.1-4.4)/*, the largest 

 observed being 65 x 4.1/* 



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



from aerial mycelium: 



Conidia: 0-septate, 26 per cent, 10 x 2.5 (8-14 x 1. 7-3.5) /* 



1-septate, 41.5 per cent, 17.3 x 3 (14-20 x 2.5-3.5)/* 

 2-septate, 10 per cent, 19.5 x 3.2 (15-31 x 2.9-4)/* 

 3-septate, 17.5 per cent, 28 x 3.6 (19-42 x 2.9^.7)/* 

 4-septate, 3 per cent j ^ % ^ % 3 



5-septate, 2 per cent J 



Average of the above measurements: 

 Conidia: 0-septate, 7.5 per cent, 9.4 x 2.55/* 

 1-septate, 14.5 per cent, 13 x 3/* 

 2-septate, 3 per cent 

 3-septate, 48 per cent, 30.8 x 3.8/* 

 4-septate, 10 per cent, 38.8 x 4.03/* 

 5-septate, 17 per cent, 45.3 x 4.2/* 



The organism was isolated only once from potato tubers, but it was 

 isolated by the writer from a specimen of Rhizoctonia-infected tomato 

 plant also, from Virginia, and by C. O. Dalrymple from ginseng garden 

 soil in New York State. This seems to be a cosmopolitan species. 



29. Fusarium sanguineum n. sp. (Fig. 25; PI. m, figs. 7 and 8; PI. vi, 

 ng. 1) 



Conidia typically strongly arcuate, gradually pointed toward apex, 

 distinctly pedicellate, 3- to 5-septate — 3-septate conidia averaging 

 33.5x3.6 (24-37x3.4-3.8)/* and 5-septate averaging 45.2x4.1 (40- 

 47 x 3.9-4.2)/* — single, in from small to medium-sized (up to 2 milli- 

 meters in diameter) sporodochia and in pseudopionnotes, the latter form 

 of fructification dominant on most media, especially on agars; chlamydo- 

 spores almost always present, intercalary in conidia and in mycelial 

 threads, borne singly, in chains and in clusters; aerial mycelium seldom 

 well developed and then from white to different shades of pink, on various 

 agars mostly absent leaving exposed pseudopionnotes of ox-blood red 

 color. 



