**Code**: [BARC](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=126105) **Organization**: United States National Arboretum, USDA-ARS **Location**: Washington, District of Columbia, U.S.A. **Total number of specimens**: 140000 **Current status**: Active **Date founded**: 1908 **Taxonomic coverage**: Seed plant families **Geographic coverage**: Worldwide **Incorporated herbaria**: McKay nut collection (USDA-ARS), Seed herbarium of the Patuxent Research Refuge **Notes**: Updated Jan 2016 (general update). **Date modified in Index Herbariorum**: 2020-11-17 > [!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.