PLANT INTRODUCTIONS. 
Experimenters will please read carefully this Introductory 
Note before sending in their requests for plant material. 
This, the Eighteenth Annual List of Plant Introductions, contains descriptions 
of many new and rare plants, not yet widely tested in this country. The available 
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 Experi- 
menters with the Office of Foreign Plant Introduction, and who have indicated a will- 
ingness 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 1929-1930. 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 request plants, place a mark to the left of the F.P.I. (Foreign Plant Intro- 
duction) number of each plant desired, and return the lists promptly to this Office. 
It should be distinctly understood that the Office does not agree to supply 
all the plants requested. It reserves the right to limit the number or to with- 
nold the entire request of any experimenter in order that it may place the material 
according to its best judgment. 
It will be noted that this list is shorter than some former lists. Each 
succeeding list will be shorter, in all probability, until it contains only such 
miscellaneous material as remains after institutional and special experiments are 
provided for. 
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 Office to single out individual requests and ship them at a certain date; where 
there are, however, valid reasons for requesting that material be sent at a speci- 
fied 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 Office from time to time. It is 
particularly desired that reports be sent to this Office 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 pre- 
servo the original labels sent with the plants, or accurate plats showing the loca- 
tion and F. P. I. numbers of each one. Failure to comply with these directions will 
be considered sufficient reason for a discontinuance of the cooperative relation. 
