Native vascular plants listed as extirpated from the Portland area in Urbanizing Flora of Portland, Oregon, 1806-2008: https://ir.library.oregonstate.edu/concern/technical_reports/j6731792f
Native vascular plants listed as extirpated from the Portland area in Urbanizing Flora of Portland, Oregon, 1806-2008: https://ir.library.oregonstate.edu/concern/technical_reports/j6731792f
