**Code**: [PH](https://sweetgum.nybg.org/science/ih/herbarium-details/?irn=123882) **Organization**: Academy of Natural Sciences **Department**: Botany Department **Location**: Philadelphia, Pennsylvania, U.S.A. **Total number of specimens**: 1430000 **Current status**: Active **Date founded**: 1812 **Taxonomic coverage**: All groups, especially Pandanaceae, Rutaceae, Cyperaceae, Polemoniaceae, and Scrophulariaceae; important historical collection of macrofossils; historical collections of bryophytes, fungi, and algae **Geographic coverage**: Asian-Malesian-Pacific and Australasian regions, especially peninsular Malaysia; southeastern Pennsylvania, southern New Jersey, northern Delaware, and northeastern Maryland **Incorporated herbaria**: PENN (250 000 specimens) in 1974., American Philosophical Society in 1897., Wagner Free Institute of Science, 4000 bryophytes, general collections from Rachel Littley Botley in 1973, Transeau Collection of Zygnemataceae (microslides), originally at ARIZ **Important collectors**: W. Baldwin, B. S. Barton, J. J. H. de la Billiardière, R. L. Botley, W. M. Canby, W. Clark, S. Elliott, J. M. Fogg, Jr., J. R. Forster, J. G. A. Forster, M. G. Henry, T. Horsfield, A. B. Lambert, C. F. von Ledebour, M. Lewis (PH-LC), B. Long, A. Michaux, J. S. Mill, G. H. E. Muhlenberg, T. Nuttall, N. S. Parmentier, F. W. Pennell, T. C. Porter, F. T. Pursh, C. S. Rafinesque, W. Roxburgh, J. F. Royle, A. von Schlagintweit, L. D. von Schweinitz, C. W. Short, W. Stone, E. Tuckerman, H. A. Wahl, N. Wallich, E. T. Wherry, C. L. P. Zeyher **Notes**: Updated Aug 2021 (correspondent change, staff update, statistics update). PH is the oldest institutional herbarium in U.S. It is a national resource for material from 1750-1850, with some dating from as early as 1689. Some historical material restricted; write for information. Microfiche edition and index of presently segregated types and early authentication specimens of vascular plants as well as Barton and Muhlenberg herbaria available. **Date modified in Index Herbariorum**: 2022-08-31 > [!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.