Urbanizing Flora of Portland, OR

The Urbanizing Flora of Portland, Oregon is an ongoing project documenting the impact of urbanization on the floristic composition of the Portland-Vancouver region. Updated in 2025, the publication lists 1,942 vascular plant taxa from 139 plant families found in the Portland-Vancouver region. Each species includes historical (pre-1980) and current (1980-2024) narratives on collections and observations, habitat, abundance, and other notes.

The 2025 edition updates the original 2009 publication, which in addition to the species list contained biographies of historical Portland-area botanists, habitat descriptions, and analysis of the changing Portland-Vancouver landscape and its effects of the flora. We highly recommend reading the 2009 publication alongside the updated 2024 document.

Download the 2025 edition (Kimpo et al.) here: Download PDF 

Download the 2009 edition (Christy et al.) here: Download PDF