PLANT INTRODUCTIONS 



Experimenters will please read carefull y this introducto ry 

 note before sending in their requests fo r plant material . 



This, the Thirtieth Annua] List of Plant Introductions, contains descrip- 

 tions of many new and rare plants, not yet widely tested in this country. T-he avail- 

 able information concerning some of them is meager, and it is therefore impossible to 

 speak with assurance regarding their value, their cultural requirements, and their 

 adaptability to the various climates and soils of the United States. 



These plants have been imported because it is believed some direct or indirect 

 use can be made of them. They are first placed at the disposal of the experts engaged 

 in plant breeding, crop acclimatization, and horticultural investigations generally 

 in the United States Department of Agriculture and the State Experiment Stations. 

 Some of them have been grown in sufficient quantity, however, so that they can be 

 distributed to some private experimenters who have the facilities to test them care- 

 fully. The List is therefore sent to those who have qualified as experimenters with 

 the Division of Plant Exploration and Introduction, and who have indicated a willing- 

 ness to care for material sent them. 



Accompanying this Annual List are complete Check Lists showing all plants 

 available for distribution at the several Plant Introduction Gardens during the season 

 1941-42 and the Garden from which available. Applicants for material should fill out 

 all blanks at the top- of the Check List of each garden from which they request plants, 

 place a mark to the left of the P. I. (Plant Introduction) number of each plant 

 desired, and return the lists promptly to this Division. Items marked with an 

 asterisk (*) are available in somewhat larger numbers, for propagating purposes, to 

 interested nurserymen having exceptional facilities. 



It should be distinctly understood that the Division does not agree to supply 

 all the plants requested. It reserves the right to limit the number or to withhold 

 the entire request of any experimenter in order that it may place the material 

 according to its best judgment. 



The shipping season extends, as a rule, from December 1 to April 1. V/hile it 

 may not always be practicable to ship plants at the time preferred by experimenters, 

 it is much desired that when such preference exists it be indicated in the .space 

 provided for it at the head of the Check List. 



T hese plants are placed in the hands of experimenters with the understanding 

 that reports on their behavior will be sent to this Division from time to time, par- 

 ticularly noting their flowering, fruiting, hardiness, utilization, and any other 

 interesting ^ uures. Reports should be prepared (preferably, but not necessarily, on 

 regular forms) and sent, wit hout special request , whenever in the judgment of the 

 experimenter the plant has reached a stage that makes a report v/orth while; usually, 

 however, unless the plant has flowered or died, reports should not be made within the 

 first year or two. Regular report forms will be furnished by this Division, upon 

 request. When all the plants of any P. I. number have died, this should be reported 

 promptly by letter, with the cause of death indicated when known. It is e xpected that 

 e xperimenters will kee p their plants l abe led at all times , and kee p accurate charts 

 showin g the location and P^I^ HiiSber of each one^ E§iiy,I§ 12. £2?lEiX v^ith these 

 direc tions will be considered sufficient reason for a discontinuance of the c oopera - 

 tive relation. 



