Central Puget Sound

Serving King County and the south part of Snohomish County, the CPS Chapter is passionate about studying and protecting native plants and their surrounding native forests, alpine areas, wetlands, coastal areas, streams within a booming population.


Central Washington

Known for it's spring floral display, the shrub steppe covers an elevation gain of 1200 feet that includes the sandy shores of the Columbia River, coniferous forest and high elevation meadows. Central Washington chapter serves Yakima and Kittitas Counties and includes nearly 1500 plant species.

Columbia Basin

Centered in the dry shrub-steppe of the lower Columbia Basin and reaching to the east into the rolling hills of the Palouse Prairie, the Columbia Basin Chapter of provides a resource for anyone interested in exploring our native flora.

Koma Kulshan

The Koma Kulshan chapter, based in Whatcom County, invites you to explore the diversity of plants in northwest Washington from tidewater to the summit of lofty Mt. Baker. The Koma Kulshan Chapter is active offering a large assortment of events and field trips throughout the year.

Northeast WA

The Northeast chapter is centered in Spokane and offers the opportunity to observe, explore, and protect a wide range of native plant communities including subalpine meadows, montane and lowland forests, Palouse prairie remnants, shrub-steppe, riparian zones, and wetlands.


The Okanogan Chapter efforts are concentrated in exploring a region roughly between the North Cascades and the Kettle Range, from Lake Chelan to the Canadian border. Each year there are generally about a dozen field trips and all visitors are welcomed to join.  

Olympic Peninsula

From the peaks of the Olympic Mountains, to the blooming camas prairies, and down to the beaches, the Olympic Peninsula Chapter is engaging and diverse. Join if you're interested in getting involved in your backyard, or make a special trip for one of our events.


Salal Chapter brings together Snohomish, Skagit, and Island Counties and represents a diverse flora from the Puget Sound to the Cascade Mountains. Please join us for the quarterly scheduled program or visit our gem, the Salal Native Plant Garden in Mount Vernon.

San Juan Islands

The San Juan Islands boast beauty from every island corner featuring forests, prairies, Garry oakwoodlands, and wetlands. This chapter meets annually in February with occassional events and trips planned throughout the year. The San Juan Islands Chapter supports educational outreach on the values of the native flora and its habitat throughout the islands.

South Sound

The South Sound Chapter serves Pierce, Thurston and adjacent counties with chapter meeting and educational presentations in Tacoma and Olympia from October through May. Hikes and special programs may be held throughout the year. Presentations, field trips and plant sales are all open to the public. Join us and help preserve our special South Sound flora heritage.


Named for famed botanist Wilhelm Suksdorf, the Suksdorfia chapter roams the hills and trails of ​the ​Columbia ​River ​Gorge during its eight to ten annual wildflower hikes, starting as soon as the grass widows peak forth. The chapter gathers for several informative, entertaining ​presentations​ each year, and supports occasional small, local conservation, and educational efforts.


Wenatchee Valley

The Wenatchee Valley chapter encompasses Chelan and Douglas Counties; including eastside Cascade Mountain forests, alpine meadows and peaks, the Columbia River, Lake Wenatchee and Lake Chelan, Columbia Basin basalts, and the shrub-steppe. The chapter offers public education talks October to March and plant hikes during the warmer months.