63 
susceptible to the particular race of loose smut used, while Mon- 
arch is resistant. In most of the experiments, Gothland was 
successfully infected, while Monarch remained free. Similar ex- 
periments were carried out, using cultures of covered smut and, 
in these experiments, Monarch was infected while Gothland was 
not. Attempts have been made to infect both Gothland and 
Monarch with single conidial cultures of definite races of the two 
smuts. Other experiments have been made in which a culture 
derived from two conidia in certain combinations has been used. 
GRADUATE STUDENTS AND INDEPENDENT INVESTIGATORS 
ENROLLED DurinG 1933 
In addition to the members of the Botanic Garden personnel, 
four graduate students and independent investigators were en- 
gaged in carrying on botanical research in the laboratories of the 
Garden. 
Mrs. Marie E. Conklin has continued her investigations on the 
bacteria which form the tubercles on the wild legumes. Her stud- 
ies involve the problem of the cultural characteristics of the 
bacteria isolated from different plants, and also their capacity for 
infecting. She began her studies at the University of Wisconsin, 
where she obtained the A.M. Degree in 1930. She is continuing 
her investigations, with a view to submitting the data as a basis 
for a Doctor’s thesis at Columbia University. 
Dr. Frances A. Hallock, Associate Professor of Biology in 
Hunter College, has used some of our facilities in connection with 
her study of the morphology and relationship of the evergreen 
shrub Gaarya. 
Dr. Elva Lawton, a member of the Biology Department of 
Hunter College, has continued her investigations on regeneration 
and polyploidy in ferns. Her studies are a continuation of re- 
searches carried out in the University of Michigan, where she re- 
ceived the Doctor’s Degree in 1931, 
Mr. Hans E. Vollert, during the first part of the year, was 
enrolled at New York University, majoring in plant pathology at 
the Botanic Garden. Mr. Vollert is a graduate of the University 
of Leipzig, and also has the equivalent of the degree of Master of 
Science from that Institution. He was engaged in the study of 
the cultural characteristics of certain smuts, and had also taken up 
some work on the thrips of the iris and gladiolus, 
st 
