
          Accompanying this catalogue is a complete check list of
all plants ready for distribution during the season 1920-1921 .
This list Includes not only those plants descriptions of which
appear in the body of this catalogue, but also a large number
of plants which are not so described,- either because only a
few plants are now available for distribution, or because
the data available regarding them are too meagre to warrant
publication.

Requests for material in this catalogue should be made
by checking the desired plants in the accompanying checklist;
and, returning the list promptly to the Office of Foreign Seed
and Plant Introduction after filling out the blanks on the
front page. It will aid this Office in its distribution work
if each experimenter will fill out all blanks, check the list
carefully, and make no other notes or requests on the check
list itself. Requests for plants not on the check list, or
notes on plants received heretofore should be made in a sep-
arate letter.

The number of plants available for distribution under
many of the numbers listed is very small; and, therefore,
it will be impossible to fill all requests.

All seeds and plants imported by this Office are ex-
amined upon arrival by the Federal Horticultural Board; and
the plants grown from these original importations are further
Inspected before being sent out. Every effort is being made
to insure the distribution of only such seeds and plants as
are perfectly healthy and do not harbor any injurious plant
diseases or insect pests.

DAVID FAIRGHILD,
Agricultural Explorer in Charge.

OFFICE OF FOREIGN SEED AND PLANT INTRODUCTION,
Washington, D. C, November 30, 1920.
        