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PLA..T INTROLUCTIONS. 
Experimenters will please read carefully this introductory 
note before sending in their requests for plant material. 
This the Twenty-third Annual List of Plant Introductions, contains descrip-— 
tions of many new and rare plants, not yet widely tested in this country. The avail-— 
able information concerning some of them is meager, and it is therefore impossible to 
speak with assurance regarding their value, their cultural requirements, and their 
adaptability to the various climates and soils of the United States. 
These plants have been imported because it is believed some direct or indirect 
use can be made of them. They are first placed at the disposal of the experts en— 
gaged in plant breeding, crop acclimatization, and horticultural investigations gen— 
erally in the United States Department of Agriculture and the State Experiment Sta— 
tions. Some of them have been grown in sufficient quantity, however, so that they 
can be distributed to some private experimenters who have the facilities to test them 
carefully. The List is therefore sent to those who have qualified as experimenters 
with the Division of Plant Exploration and Introduction, and who have indicated a 
Willingness to care for material sent then. ‘ 
Accompanying this Annual List are complete Check Lists showing all plants 
available for distribution at the several Plant Introduction Gardens during the 
season 1934-5 and the Garden from which available. Applicants for material should 
fill out all blanks at the top of the Check List of each garden from which they re— 
quest plants, place a mark to the left of the P. I. (Plant Introduction) number 
of each plant desired, and return the lists promptly to this Division. Items marked 
with an asterisk (*) are available in somewhat larger numbers, for propagating 
purposes, to interested nurserymen having exceptional facilities. 
it should be distinctly understood that the Division does not agree to supply 
all the plants requested. It reserves the right to limit the number or to withhold 
the entire request of any experimenter in order that it may place the material ac— 
cording to its best judgment. 
The shipping season extends, as a rule, from December first to April first. 
Because of the large quantity of plants which must be handled, it is difficult for 
the Division to single out individual requests and ship them at a certain date; 
where there are valid reasons, however, for requesting that material be sent at a 
specified time, every effort will be made to meet the requests. 
These plants are placed in the hands of experimenters with the understanding 
that reports on their behavior will be sent to this Division from time to time. It 
is particularly desired that reports be sent regarding the flowering, fruiting, 
hardiness, utilization and other interesting features of plants which have been sent 
for trial; and it is expected that experimenters will at all times preserve the orig-— 
inal labels sent with the plants, or accurate plats showing the location and P. I. 
number of each one. Failure to comply with these directions will be considered suf-— 
ficient reason for a discontinuance of the cooperative relation. 
