**Code**: [NA](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=126220) **Organization**: United States National Arboretum, USDA-ARS **Location**: Washington, District of Columbia, U.S.A. **Total number of specimens**: 700000 **Current status**: Active **Date founded**: 1934 **Taxonomic coverage**: Cultivated, ornamental, landscape, economic, and ethnobotanical plants; cultivated woody plants of southeastern U.S.A.; worldwide progenitors of cultivated plants **Geographic coverage**: Worldwide **Incorporated herbaria**: Part of PHIL in 1964, Part of the Martindale herbarium in 1964, Part of LCU (including types) in 1984, Part of MOAR (including types), Part of the Biltmore herbarium, U.S. Geological Survey in 2021 (3000 specimens) **Important collectors**: W. A. Archer, , C. F. Austin, R. M. Austin, C. R. Ball, H. N. Bolander, T. S. Brandegee, S. B. Buckley, W. M. Canby, A. W. Chapman, T. F. Cheeseman, J. W. Chickering, Jr., I. W. Clokey, J. M. Coulter, A. H. Curtiss, T. R. Dudley, A. D. E. Elmer, G. Englemann, D. Fairchild, M. Furuse, J. F. A. P. Gaudin, N. Goodall, M. L. Grant, E. L. Greene, D. Houghton, J. Howell, T. J. Howell, R, M. Jefferson, I. M. Johnston, M. E. Jones, W. N. Koelz, J. G. Lemmon, I. C. Martindale, F. A. McClure, F. N. Meyer, F. G. Meyer, E. Palmer, S. B. Parish, C. C. Parry, C. G. Pringle, J. H. Redfield, P. L. Richer, F. Rugel, C. S. Sargent, J. K. Small, W. N. Suksdorf, I. Tidestrom, W. T. Tsang, G. Vasey, I. L. Wiggins **Date modified in Index Herbariorum**: 2022-11-10 > [!cite] This page is automatically generated • Data on this page were obtained from [Index Herbariorum](https://sweetgum.nybg.org/science/ih/) on 2023-08-23. • Meaning of acronyms in TL-2 is not always the same as in IH. Consult list of original [[Abbreviations|abbreviations]] if you suspect acronym mismatch.