PLANT INTRODUCTIONS. 



Experimenters will please read carefully this introductory 



note before sending in their requests for plant material. 



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This, the Twentieth 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. Th9 List is therefore sent to those who have qualified as Experimenters 

 with the Division of Foreign Plant Introduction, and who have indicated a willingness 

 to care for material sent them, 



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Accompanying this Annual List are complete Check Lists showing all plants 

 o 

 z available for distribution at the several Plant Introduction Gardens during the 



season 1931-2 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 v/hich they re- 

 quest plants, place a mark to the left of the F. P. I. (Foreign Plant Introduction) 



00 number of each plant desired, and return the lists promptly to this Division 



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■g 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 requests of any experimenter in'order that it may place the material ac- 

 cording to its best judgment. 



It will be noted that this list is shorter than some former lists. Each suc- 

 ceeding list will be shorter, in all probability, until it contains only such mis- 

 cellaneous material as remains after institutional and special experiments are pro- 

 vided 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 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 regaraing 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 F. 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. 



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