PH (the official, internationally recognized abbreviation for the herbarium at the Academy of Natural Sciences) 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.

GBIF url: https://www.gbif.org/dataset/039c9aba-2f77-4001-a72a-40b9fa830ab4
Citation: Academy of Natural Sciences (2026). Academy of Natural Sciences of Drexel University - Bryophytes. Occurrence dataset https://doi.org/10.15468/3qrghp accessed via GBIF.org on 2026-08-07.