The herbarium of the Academy of Natural Sciences of Drexel University houses the Academy's collection of botanical specimens. Because the Academy was one of the first scientific institutions in the New World, the herbarium holds some of the oldest and most important plant collections in the Americas. PH (the official, internationally recognized abbreviation for the herbarium at the Academy of Natural Sciences) has about 1.4 million dried, pressed specimens and plays a vital role as a resource for research on plants and on the history of American botany.
Of the estimated 1.4 million specimens in the collection, about 42,000 are in the online database: ph.ansp.org. This database includes nearly 27,000 type specimens and about 23,000 images.
Collectors and Collections
The list of collectors whose specimens are housed at PH is a veritable Who's Who of early botany and scientific exploration in North America. The table below provides just a glimpse of the highlights of our special collections; for a more complete presentation consult Mears (1981). Notably, PH has all but a few of the specimens that were brought back from the expedition of Meriwether Lewis and William Clark. (You can also check out the plants collected by Lewis and Clark in an online exhibit at plantsystematics.org or at the Lewis & Clark as Naturalists online exhibit at the Smithsonian.) B. S. Barton and G.H.E. Muhlenberg were early members of the American Philosophical Society (APS), the first scientific association in the New World, founded by Benjamin Franklin, John Bartram, and others. The APS herbarium came to PH at the end of the 19th century; other institutional and private donations have extended the scope and strength of the collection. (See APS Collections on Deposit at ANSP APS Collections on Deposit at the Academy.)
Examples of historically significant collectors
and sources of specimens housed at PH
|Collector/Source||Active Period||Specimens ||notes|
|Benjamin Smith Barton
||Many holotypes of Pursh, Torrey & Gray, Nuttall|
||North America, West Indies|
||late 18th-early 19th century
||Early Eastern US|
||Early 19th century
||Western North America |
|C. W. Short
|Lewis D. von Schweinitz
||Early 19th century
||Worldwide, plants and fungi|
The herbarium also has notable strengths that reflect the taxonomic or geographic interests of past curators and associates including F. W. Pennell (Scrophulariaceae, the snapdragon family; Asia and S. America,), E. T. Wherry (Polemoniaceae, the phlox family), T. C. Porter, M. G. Henry (Pacific Northwest), B. H. Long (Eastern US), B. Stone (Pandanaceae, the screw pine family; Rutaceae, the citrus family; S. E. Asia), and A.E. Schuyler (Cyperaceae; the sedge family). PH is the primary repository and source of information for these botanists' collections. Download a pdf on these and other collectors represented in the PH.
You can view the PH collection of the Pandanaceae at: ph.ansp.org/collections/pandanaceae/, and the PH collection of specimens collected by Forster and Forster at ph.ansp.org/collections/forster.
The significance of the collection is further evidenced by the large Type Collection (>40,000 specimens).
Size of PH Collections
|Taxon/Category||Collection Size||Related Documents|
|Vascular Plants: |
||Ferns at PH|
||Cones, Fruits and seeds
||Seed Vials at PH|
||Algae (including cyanophytes)
||Algae at PH|
||Fungi at PH|
|Subtotal, General Collection
See Vascular Herbarium and Cryptogamic Herbaria for more information on the collections. See Collection Policies for information on access, specimen acquisition, loans, destructive sampling and deposition of specimens. A bibliography of bibliography of recent publications on the PH Collections is also available.
The Botany Department has recently upgraded its Type and Special Collections facilities and its Herbarium cabinets. The department is currently working on Virtual Types, which will make the Type Collection available online. See Curation Upgrades.