1916] 
GILMAN—CABBAGE YELLOWS 29 
in the following respects: Fusarium Brassicae forms sporo- 
dochia, while in F. conglutinans these are much reduced and 
usually not formed at all. F. Brassicae has conidia which are 
two-septate, while F. conglutinans has conidia, the majority 
of which are non-septate with a few one- and three-septate 
forms, two-septate spores not appearing. The main point of 
resemblance, from the description of F. Brassicae, is that the 
spore measurements fall within the same limits—a fact which, 
in view of the above differences, would scarcely suffice to put 
the two as synonymous. 
Fig. 2. Conidia production of F. conglutinans in Uschinsky's fluid after 
48 hours. Culture I. Camera lueida sketeh >x 1000. 
While the above description by Wollenweber is perhaps 
sufficient to differentiate F. conglutinans as a distinct form, 
it is hardly adequate as a diagnosis of the species; moreover, 
the question may be raised as to whether a physiological char- 
acter, such as color production on a special medium, which 
has not been regarded as of specific rank in related genera, 
is sufficient basis for the establishment of a new species in the 
genus Fusarium. This, of course, introduces a new factor 
into the taxonomy of this genus, but the writer would hold it 
