Hosted by the University of Washington Herbarium, Burke Museum
The Washington Flora Checklist aims to be a complete list of the native and naturalized vascular plants of Washington State, with current classifications, nomenclature and synonymy. The checklist currently contains 3,712 accepted terminal taxa, of which 2,660 are native.
Taxa included in the checklist:
- Native taxa whether extant, extirpated, or extinct.
- Exotic taxa that are naturalized, escaped from cultivation, or persisting wild.
- Waifs (e.g., ballast plants, escaped crop plants) and other scarcely collected exotics.
- Interspecific hybrids that are frequent or self-maintaining.
- Some unnamed taxa in the process of being described.
Fred Weinmann initiated development of the checklist in 1998, and with the help of Peter Zika and others a draft checklist was completed by 2002. In 2007 the checklist was transferred to the UW Herbarium, funded by grants from the Bureau of Land Management and the Washington Native Plant Society. In 2018 the checklist underwent a major update to align nomenclature with the 2nd Edition of the Flora of the Pacific Northwest and integrate the checklist with the Burke Herbarium Image Collection and the Consortium of Pacific Northwest Herbaria database to provide unified nomenclatural management across the Herbarium's online resources; funding was provided by the Washington State Department of Agriculture.
Family classifications follow APG IV for angiosperms, PPG I (J. Syst. Evol. 54:563–603. 2016) for pteridophytes, and Christenhusz et al. (Phytotaxa 19:55–70. 2011) for gymnosperms, with a few exceptions. Nomenclature and synonymy at the rank of genus and below follows the 2nd Edition of the Flora of the Pacific Northwest except where superceded by new information.
Please note: This is a working checklist, continuously updated. Use it at your discretion.
Last updates made on 12/21/2024.
