54 E. J. BUTLER. 
carrot the two were about equal. Though in the standard solution 
with 1% sodium carbonate no growth took place, the tolerance 
for alkali is shown in the alkaline cultures on solid media and was 
also evident in some field experiments mentioned below, in which 
the disease was not diminished by heavy liming. Most Fusaria so 
far investigated agree in this respect. 
For the fungus possessing the characters above described 
I propose the name Fusarium udum, without prejudice to the 
question, which I hold to be unanswerable, whether it has been 
previously included amongst the named members of the genus. 
The followmg diagnosis should serve to identify it with sufficient 
accuracy. 
Fusarium udum n. sp. 
Mycelium parasitic within the roots of the host plant or sapro- 
phytic and then creeping ; hyphe hyaline, slender, much branched, 
usually with little aerial growth ; microconidia of the Cephalosporium 
type, produced successively on the ends of short simple or clustered 
conidiophores and remaining bound in a drop of liquid after abjunc- 
tion, unicellular or with 1 or more septa, elliptical or falcate, hya- 
line singly, salmon pink in mass, occasionally developing from the 
surface of minute spherical stromata and then of the Tubercularia 
type, 5to 15 by 2 to4 in diameter ; microconidial stage in culture 
usually moist and bacteria-like, white to salmon pink, occasionally 
(on rice) orange-red, never green, blue or purple; macroconidia of 
the Fusarium type, formed as the microconidia but on shorter 
conidiophores and becoming free as soon as abjuncted, falcate, 3 to 
5-septate, hyaline, 15 to 50 by 3 to 5 in diameter, usually late in 
appearmg ; chlamydospores, round or oval, rather thick-walled, 
hyaline, sometimes in short chains, 5 to 10” in diameter. 
Parasitic in roots of Cajanus indicus and saprophytic in soil, 
India. 
Other biological characters of Fusarium udum. 
The fungus remains alive in soils, even in the absence of the 
host plant, for a considerable period. The pot experiments have 
