It will be 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 imported 

 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 experi- 

 menters. • This makes essential the preservation of the Annual List as a work of 

 reference, and the Division desires to urge upon its cooperators the importance of 

 this step. Unless the Annual lists are preserved, the Division later will be flooded 

 with inquiries from persons who have received plants and who desire information con- 

 cerning them. Answering such inquiries involves much unnecessary labor and expense. 



For convenience in using the Annual List, after each description is given in 

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



