Document Type

Article

Publication Date

4-1991

Abstract

There are few crops native to the United States, causing us to rely on introduced species for most of our food. The United States government recognized the importance of such introduced plants before the turn of this century, and began recording and consecutively numbering plant introductions (PI) in 1898.

Comments

This article is from HortScience 26, no. 4 (April 1991): 326–451.

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Language

en

File Format

application/pdf

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