Flora of Oregon
Learn about the diverse plants of Oregon with our beautiful, comprehensive, and research-based reference tools.
The Flora of Oregon is a three-volume reference that will be the state’s only flora published in the past half century and the first illustrated floristic work that exclusively addresses Oregon. Volumes 1 and 2 were published in 2015 and 2020, respectively, and can be purchased directly from the publisher, the Botanical Research Institute of Texas Press, or from other vendors. Volume 3 has a projected publication date of 2023. Upon completion, we estimate detailed descriptions of 4,380 native and naturalized taxa will be published in the three volumes.
Stay informed and keep your Flora up-to-date
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Errata for volumes 1&2
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Volume 1 & 2 taxa not treated in the printed Flora, but present on our website
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Taxonomic changes since publication of the flora volumes
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Glossary of terms used
Each volume is a beautifully illustrated regional flora that informs plant identification. Included are chapters and appendices providing essential context in topics such as ecology, habitats, gardening with natives, and insect-plant relationships.
Flora of Oregon Volume 1:
Pterodophytes, Gymnosperms, and Monocots
Notable families in Volume 1 include all ferns and fern allies, conifers, sedges (Cyperaceae), grasses (Poaceae), orchids (Orchidaceae), and lilies. Front chapters are richly illustrated with color photographs; they describe the state’s ecology and predominant plant habitats, 50 of the best places to see wildflowers, and biographical sketches of notable Oregon botanists. Appendices detail taxa restricted to a single ecoregion, endemics, and those not collected in more than 50 years.
Flora of Oregon Volume 2:
Dicots Aizoaceae - Fagaceae
Notable families in Volume 2 include the sunflowers (Asteraceae), mustards (Brassicaceae), heaths (Ericaceae), and legumes (Fabaceae). Filled with photographs, the front chapters cover gardening with native plants and plant-insect interactions with a focus on butterflies and pollinators. Appendices list butterfly-foodplant pairs, pollinator specialists and their targeted plants, native garden plants that support insects, and features of native species used for gardening and landscaping.
Help sponsor Volume 3!
Become a part of this lasting legacy - help us complete the series by sponsoring a treatment or illustration for Volume 3 – Dicots: Garryaceae - Zygophyllaceae!
Get started by simply downloading our Oregon Flora Volume 3 sponsorship form:
Praise for Flora of Oregon
There is now a new standard of excellence for a state flora.Neil Harriman, Plant Science Bulletin 61(4)
These two well-bound, attractive, and user-friendly publications contain an immense amount of valuable floristic and conservation information that is applicable far beyond their home state.Jenifer Penny & Daniel Brunton
From start (fascinating introductory materials) to finish (information-rich appendices) and everything in between (inspired treatments), this is a winner.Jenifer Penny & Daniel Brunton
We can only hope Volume 3 is not far off so Flora of Oregon can assume its position as the new standard of excellence for the production of regional North American floras.Jenifer Penny & Daniel Brunton,
Canadian Field Naturalist v.135(1)
Page layouts for species treatments strikes a good visual balance between illustrations, maps and text. I was struck by how usable this format is, compared to many older floras.Kathleen Sayce, Douglasia 45(3)
Contemporary, authoritative, comprehensive, well-illustrated, beautifully laid-out, and easy-to-use.David Giblin, Native Plant Society of Oregon 2015 Book Review