
          It will be necessary for experimenters to preserve and refer to the Annual
List of Plant Introductions, or to the Inventories published by the Office, 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
experimenters. This makes essential the preservation of the Annual List as a work
of reference, and the Office desires to urge upon its cooperators the importance of
this step. Unless the Annual lists are preserved, the Office will be flooded with
inquiries from people who have received plants, and who desire information concerning 
them. Such inquiries involve much unnecessary labor and expense.

For convenience in using the Annual List, after each description is given, in
parenthesis, the name of the Garden from which the plants will be sent.
        