289 F 
Van der Bijl noted the formation in culture of what he called 
wart-like bodies during his study of the same Fusarium on 
carnations,* but he said nothing about their having any apparent 
function. Coremial strand mycelial formation is not a constant 
character, but it occurred in Butler’s and the present cultures 
although on different media. As for the diagnostic characters 
on which Dr. Butler lays stress, the bacterial-like surface streaks 
already mentioned were very evident, and the colourations were 
practically alike. The colour differences mentioned in Nos. 3, 
4, and 5 do not seem worthy of weight, despite the present tend- 
ency to lay stress on cultural colours, for it was found in these 
studies that salmon-pink or a shade of yellow or cream might be 
associated with spore formation. In any case, a certain amount 
of all-round variation must be allowed for, so long as it is impossible 
to reproduce the exact environmental conditions employed by 
another worker at another time. Similarly, the differences noted 
in Nos. 5, 8, 9 and 2 have little or no importance when regarded as. 
possible specific distinctions. 
Morphologically, the Fusarium under investigation and 
Fusarium udum are identical in most points. Microconidial 
formation takes place early and is remarkably copious. The 
conidiophores may be simple (fig. 12) or whorled; the former: 
Fig. 12. Simple conidiophores oie pip creeping mycelium in a. 
boiled rice culture, 3 days (cashew nut), 500. 
were by far the more common; the bidet were found in greatest 
abundance in the normal rice and acid potato cultures, as also 
were the characteristic bundles of microconidia (fig. 13). ere 
occurred frequently an intermediate form of SOAS phe in 
which the main axis of the simple conidiophore of fig. 12 gave 
rise to short lateral branches each bearing a conidium. The 
surfaces of all slant cultures became and remained moist with 
masses of spores. The microconidia germinated readily in 
hanging-drops of distilled water and gave rise to one or two 
stout filaments which took their origin from the ends of the 
conidium and were observed to produce only further microconidia 
* loc. cit., p. 276. 
= 18834 Cc 
