The herbarium of the Academy of Natural Sciences (PH) is the oldest institutional herbarium in the United States. It is a national resource for material from 1750-1850. The diatom herbarium (ANSP) is managed separately.

GBIF url: https://www.gbif.org/dataset/f873ef66-231a-4ea3-bd4d-a16f182bf337
Citation: Academy of Natural Sciences (2026). Academy of Natural Sciences of Drexel University. Occurrence dataset https://doi.org/10.15468/s55f2k accessed via GBIF.org on 2026-08-07.