It will bs necessary for experimenters to preserve and refer to the Annual Lists 

 of Plant Introductions or to the Inventories published by the Division, for information 

 regarding the plants. Each Inventory lists the seeds and plants iaported during a period 

 of three months. Its object is to serve as an historical record; it is not printed 

 immediately following the arrival of the plants, but eighteen to twenty-four months 

 later. The edition is limited and it cannot be supplied to all experimenters. This 

 makes essential the preservation of the Annual Descriptive List as a work of reference, 

 and the Division desires to urge upon its cooperators the inportance of this step. 

 Unless the Annual Lists are preserved, the Division later will be flooded with inquiries 

 from persons v/ho have received plants and who desire information concerning them. 

 Answering such inquiries involves much unnecessary labor and expense. 



For convenience in using the descriptive list, after each description is given 

 in parenthesis the name of the garden or gardens at which the plants are being grown. 



