FusARiA OF Potatoes 193 



5-septate, 80 per cent, 53 x 4.2 (50-58 x 4. 1-4.4) m, the largest 

 observed being 65 x 4.1/x 



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)ju 



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

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

 3-septate, 17.5 per cent, 28 x 3.6 (19^2 x 2.9-^.7) m 



4-septate7 3 per centl 3^ ^ ^ ^ (30^5 x 3.9-5.2)^ 

 5-septate, 2 per cent J 



Average of the above measurements: 

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

 1-septate, 14.5 per cent, 13 x Six 

 2-septate, 3 per cent 

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

 4-septate, 10 per cent, 38.8 x 4.03/1 

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



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. iii, figs. 7 and 8; PL vi, 



fig. 1) 



Conidia typically strongly arcuate, gradually pointed toward apex, 

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

 33.5x3.6 (24-37 X 3.4-3.8) M and 5-septate averaging 45.2x4.1 (40- 

 4:7 X 3. 9-4.2) ij. — 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 myoelial 

 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. 



