Contributions from the United States National Herbarium

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