EXPLANATORY NOTE. 
This circular is made up largely from notes re- 
ceived from our agricultural explorers, foreign cor- 
respondents, collaborators, and others relative to the 
more important plants which have been received recent- 
ly by the Of flee of Foreign Seed and Plant Introduction 
of the Department of Agriculture. In it are also con- 
tained accounts of the behavior in America of plants 
previously introduced. 
Descriptions which appear here are revised and 
published later in the Inventory of Seeds and Plants 
Imported. 
These are ONLY ANNOUNCEMENTS OF THE ARRIVAL OF 
THE PLANT MATERIAL. With the exception of seed re- 
ceived in quantity, it must, be propagated before it is 
available for the experimenters. This requires from 
one to four years, depending upon the species and the 
amount of material imported. 
The Annual List of New Plant Introductions which 
is issued every autumn gives descriptions of the ma- 
terial ready to send out to experimenters. You can 
apply for any material described in Plant Immigrants 
and your application will be kept on file and given 
precedence whenever the material is sent out. If the 
number of such applications on file is sufficient to 
exhaust the available supply of any particular plant, 
it will not be described in the Autumn List of New 
Introductions. 
One of the objects of the Office of Foreign Seed 
and Plant Introduction is to secure experimental quan- 
tities of hew or rare foreign seeds or plants for 
plant breeders and experimenters, and every effort 
will be made to fill specific requests. 
DAVID FAIRCHILD, 
Agricultural Explorer in Charge, 
Office of Foreign Seed and Plant Introduction. 
Issued March 31, 1922. Washington, D. C. 
Any one desiring to republish any portion of this 
circular should obtain permission by applying to 
this Office. 
