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The Contributions from the United States National Herbarium (Contr. U.S. Natl. Herb.) is an externally peer-reviewed periodical published by the Department of Botany at irregular intervals. It is available for free and as an exchange publication for the Smithsonian Institution Libraries. The purpose of the Contr. U.S. Natl. Herb. is to provide a vehicle for disseminating the results of the scientific research at the U.S. National Herbarium. These include but are not limited to, longer taxonomic papers, checklists, floras, and monographs produced by the staff and associates at the U.S. National Herbarium.

Contributions from the U.S. National Herbarium was first published in 1890 by the United States Department of Agriculture. From July 1, 1902, forward it was published as a Bulletin of the United States National Museum. The series was discontinued after volume 38, 1974, and has been revived with volume 39, 2000. A narrative describing the history of the Contr. U.S. Natl. Herb. appeared in The Plant Press, vol. 7. No. 4, 2004.

PDF files of the most recent issues (vol. 49-present) of the Contr. U.S. Natl. Herb. are available on-line and PDF files of scanned volumes 1−53 can be found at In addition, the entire set has been digitized by the Biodiversity Heritage Library (BHL). While supplies last, you may request a copy of any of the modern series (vol. 39-present) free of charge from the Department of Botany. The Contr. U.S. Natl. Herb. is also available as an exchange publication from the Smithsonian Institution Libraries. If you have any questions regarding availability of past issues or the exchange program, please write to CUSNH, Department of Botany, MRC 166, National Museum of Natural History, Smithsonian Institution, Washington, DC, 20013-7012, USA, ( If you have any questions about manuscript submission or comments on previous volumes, please contact the editor of Contr. U.S. Natl. Herb., Paul M. Peterson (

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