PLATE A 

 Fusarium spp. on vegetable media: 



Fig. 1-3 and 5. — Fusarium oxysporum Schlecht. 3045. i, Twenty-one-day-old 

 culture on potato cylinder showing typical bluish green sclerotial masses, no pion- 

 notes. 2, Eighteen-day-old culture on stem of Melilotus alba with pionnotes. 

 3, Eighteen-day-old rice culture with typical coloration of the section Elegans. 5, 

 Thirty-day-old cotton-stem culture with sporodochia. 



Fig. 4. — F. hyperoxysporum WoUenw. 3343. Thirty-one-day-old culture on potato 

 cylinder with development of pionnotes. Cultvu-es on the three other media are as 

 illustrated for F. oxysporum (fig. 1-3, 5). 



Fig. 6-8. — F. radicicola WoUenw. ; illustrates equally well F. martii and F. eumartii. 

 6, Potato cylinder 34 days old with pionnotes brown to verdigris. 7, Seventeen-day- 

 old culture on stem of Melilotus alba with pionnotes and immatiu-e sporodochia. 

 8, Rice 28 days old, with pionnotes on upper surface. Coloration of the section 

 Martiella. 



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