[Vor. 3 
28 ANNALS OF THE MISSOURI BOTANICAL GARDEN 
rophyll—while others become one-sided and stunted, but live 
throughout the summer. "The latter rarely form heads. 
CAUSAL ORGANISM 
TAXONOMY 
Cabbage yellows is caused by a soil fungus belonging to 
the genus Fusarium. The organism was first described by 
Wollenweber (713) who, basing his classification on the work 
of Appel and Wollenweber (710), placed it in the section Ele- 
gans and named it Fusarium conglutinans Wollenw. The de- 
seription given by this author is as follows: 
s EE n. sp. differs from F. orthoceras 
he absence of a wine-red color on rice which 
is a "striking dier of typical species of the section Elegans. 
Vascular parasite, cause of wilt disease of Brassica 
KE var. capitata (proved by Erwin F. acte L. R. Jones, 
L. L. Harter) in the United States of Americ 
This deserip- 
tion was based on 
a culture from 
the Laboratory 
of Plant Pathol- 
ogy of the Uni- 
versity of Wis- 
consin. The same 
е year Stevens 
(218) ascribed the 
yellows to Fusa- 
rium Brassicae 
Fig. Conidia е of vi ae % Thum., citing 
eet s fluid after 48 hou a, Culture V; b, A 
ture II; c, Culture I. Gei унда ат x ge Harter ( 09) as 
his authority in 
spite of the following facts: first, that Harter specifically 
stated that he was working with an undescribed species and, 
second, that Wollenweber had included Harter’s organism in 
his new species, F. conglutinans. Moreover, the organism that 
is parasitic on cabbage in the United States differs from Fu- 
sarium Brassicae Thüm. as described by De Thümen (280) 
