Plant Introduction (PI) Numbers for Fiber Plant Introductions                                                      

This set of cards documents fiber plant introduction (PI) numbers. The cards are arranged in alphabetical order by scientific name of plant. A majority of the cards are Division of Plant Exploration and Introduction request forms for seed and plant samples. These forms were used by Office of Fiber Investigations employees to request seed and plant samples for experiment stations or other persons conducting fiber research. Some forms contain permits with plant introduction numbers and inspection stamps.