68 
International Seed Exchange 
Communication No. 9 was published in April, containing replies 
to our questions as to the desirability of an international list of 
genera, its duration, and suggestions as to ten institutions to ad- 
vise as to a possible preliminary list. Twenty-seven replies were 
received, nearly all expressing the need of greater uniformity in 
nomenclature, but some calling attention to difficulties in the way. 
The institutions named the greatest number of times were: Berlin 
27, Kew 26, Paris 25, Geneva 16, Copenhagen, Vienna and Zurich 
each 14 times, Tokyo 13, Leningrad 12, Arnold Arboretum and 
Stockholm, each 10 times. The actual making of a list indicating 
differences in present usage is progressing. 
Research 
Studies of Frankenias and of the structures of flowers were con- 
tinued. I spent some days in the National Herbarium in Wash- 
ington and later obtained the loan of specimens from Washington, 
from the Field Museum, and from the Missouri Botanical Garden. 
In December I presented a paper on “ South American Frank- 
enias ” before the Botanical Society of America. 
During the winter Mr. Ezekiel Rivnay, a graduate student of 
New York University, came two afternoons weekly for about 
three months. He made a comparative study of flower and leaf 
morphology of the Aizoaceae and Cactaceae, presenting a thesis 
with excellent drawings for his A.M. degree. 
Miss Mary MacMurray, of Hunter College, came every Satur- 
day forenoon to make a systematic study of opposite leaved shrubs. 
Lectures and Classes 
During March I gave three lectures at the Garden on “ The 
Story of the Flowering Plants.” 
The same month the “ Evolution Exhibit ” was revised and set 
up in the Garden Exhibit at the International Flower Show. 
During May and June I gave eight field lessons on “ Spring 
Flowers and Ferns”; during October and November four out- 
” 
door lessons on “ Fall Flowers and Fruits. 
