( 260) 
Personal Investigations 
Research has been continuously prosecuted throughout 
the year as vigorously as time and facilities have per- 
mitted. The experimental work has been directed chiefly 
to studies of fertility and sterility in plants. Phenomena 
of the so-called correlative sterility have been studied in 
several species of Lilium and Hemerocallis. Studies of 
variation and heredity in respect to the morphological 
development of flowering parts (intersexualism) in Plantago 
lanceolata have been continued. Pedigreed cultures of 
ythrum Salicaria, grown from seed obtained by self- 
fertilization, have yielded important results bearing on 
intersexualism and on compatibility in fertilization in this 
interesting tri-morphic species. In this work with Lythrum 
I was very materially assisted by Mr. H. E. Thomas to 
whom you granted a scholarship for one month during the 
summer. 
Study of self-incompatibility and self-compatibility has 
been continued in the radish, in various types of pe-tsai and 
in Verbascum phoeniceum. Fertility and sterility are also 
being studied in various variegated sorts of Pelargonium 
and in a variegated sport of the strawberry. Observations 
on the flowering habits of bulb plants are being continued 
especially with reference to the after effects of forcing. 
The studies noted above have been intensive rather than 
extensive. Rather few plants have been grown but these 
have been carefully and thoroughly studied. The differ- 
ence in blooming dates of the various species and the 
growing of certain cultures in the greenhouse have dis- 
tributed the work of observation and experimental manipu- 
lation well over the year. 
The numerous bud-sport varieties previously obtained 
in Coleus have been maintained in culture and several 
new types of bud-sports have appeared. The study of 
seed progenies in these bud-sports, somewhat delayed by 
war-time conditions, has again been taken up. Numerous 
strains have now been rather thoroughly tested as to 
