Technical Reports

The following technical reports and publications were produced by, or in collaboration with, the Washington Natural Heritage Program. The reports are divided into Species and Study Area categories, and are listed alphabetically within.

Species

Arenaria paludicola: Modeling Potential Suitable Habitat for Reintroduction of Arenaria paludicola in Washington. 2024. Sienna Wessel, Walter Fertig, and Jake Kleinknecht.

Artemisia campestris ssp. borealis var. wormskioldii taxonomic review. 2012. Joseph Arnett.

Castilleja hispida: Developing an observation database for harsh paintbrush (Castilleja hispida) to reduce hybridization impacts on golden paintbrush (C. levisecta). 2025. Jesse Miller and Bruce Schneider.

Castilleja levisecta: 2023 status and conservation assessment of golden paintbrush (Castilleja levisecta) in Washington. 2024. Jesse Miller and Adam Martin.

Castilleja levisecta: Developing an Observational Database for Golden paintbrush (Castilleja levisecta). 2020. Jake Kleinknecht and Walter Fertig

Castilleja levisecta: Evaluating northern Puget Sound area sites for establishing populations of golden paintbrush. 2010. Joseph Arnett and Peter Dunwiddie.

Castilleja levisecta: An evaluation of the potential for hybridization between Castilleja levisecta and C. hispida. 2008. Thomas N. Kaye and Matt Blakeley-Smith.

Castilleja levisecta, Howellia aquatilis, Lomatium bradshawii, Silene spaldingii: Climate change and connectivity review of site designs for established natural areas with federally listed plant species. 2019. Jake Kleinknecht, David Wilderman and Walter Fertig.

Corispermum pallidum (pale bugseed): Historical and current status of a potentially extinct Washington State endemic plant species. 2008. Joseph Arnett.

Corispermum species in Washington State: A preliminary taxonomic review. 2012. Joseph Arnett.

Eriogonum codium: Status and Conservation Assessment of Eriogonum codium. 2022. Walter Fertig.

Eriogonum codium: Population Viability Analysis: Eriogonum codium (Umtanum desert buckwheat). 2007. Florence Caplow, Thomas N. Kaye, and Joseph Arnett.

Eriogonum codium: Seedling studies of Eriogonum codium (Umtanum wild buckwheat). 2005. Florence Caplow.

Hackelia venusta: Updated monitoring methods and recent population trends for Hackelia venusta. 2024. Jesse Miller, Wendy Gibble and Walter Fertig.

Howellia aquatilis: Monitoring Select Occurrences of Howellia aquatilis (water howellia) in Washington Prior to Delisting from the Endangered Species Act (1978-2021). 2024. Sienna Wessel and Walter Fertig.

Physaria douglasii ssp. tuplashensis: White Bluffs bladderpod (Physaria douglasii ssp. tuplashensis) population trends and conservation. 2025. Jesse Miller and Walter Fertig.

Pinus albicaulis: Conservation Status of Whitebark Pine in Washington. 2021. Walter Fertig and Jake Kleinknecht.

Polemonium pectinatum: Assessment of ecological condition of Silene spaldingii and Polemonium pectinatum habitat. 2012. Rex C. Crawford and F. Joseph Rocchio.

Ranunculus triternatus (obscure buttercup): Inventory, monitoring, and taxonomic review. 2013. Joseph Arnett.

Sidalcea hendersonii: Washington status of Sidalcea hendersonii (Henderson's checkermallow). 2005. Florence Caplow, Chris Chappell, and Tyson Kemper.

Sidalcea oregana var. calva and Delphinium viridescens: Potential Habitat of Wenatchee Mountains checkermallow (Sidalcea oregana var. calva) and Wenatchee larkspur (Delphinium viridescens) for Surveys and Outplantings. 2024. Jesse Miller and Bruce Schneider.

Sidalcea oregana var. calva: Status and Conservation Assessment of Sidalcea oregana var. calva. 2022. Walter Fertig.

Sidalcea oregana var. calva: Monitoring seed predation of Sidalcea oregana (Nutt.) Gray var. calva C.L. Hitchcock. 2008. Joseph Arnett and Katie Birkhauser.

Silene spaldingii: Developing an Observational Database for Spalding's catchfly (Silene spaldingii). 2018. Rebecca Niggemann and Walter Fertig

Silene spaldingii: Assessment of ecological condition of Silene spaldingii and Polemonium pectinatum habitat. 2012. Rex C. Crawford and F. Joseph Rocchio.

Sisyrinchium sarmentosum: Population and taxonomic status. 2014. Joseph Arnett.

Sisyrinchium sarmentosum: Taxonomic and population review of Sisyrinchium sarmentosum (pale blue-eyed-grass). 2012. Joseph Arnett.

Vaccinium: The status of huckleberries in Washington State. 2007. Joseph Arnett and Rex C.

Study Areas

Blue Mountains: Conservation Status and Protection Needs of Priority Plant Species in the Blue Mountains Ecoregion. 2022. Walter Fertig, Irene Weber, and Tynan Ramm-Granberg

Blue Mountains: Conservation recommendations for Lime Hill and Mount Wilson, Asotin County, Washington. 2014. Joseph Arnett.

Boistfort Valley: A southwest Washington prairie remnant. 2009. Joseph Arnett.

Columbia Plateau and East Cascades Ecoregions: Conservation Status and Protection Needs of Priority Plant Species in the Columbia Plateau and East Cascades Ecoregions. 2020. Walter Fertig and Jake Kleinknecht

Hanford National Monument: Hanford endemic plants population monitoring, 1997-2012. 2013. Joseph Arnett.

Hanford National Monument: Hanford endemic plants population monitoring. 2012. Joseph Arnett.

Hanford National Monument: Studies of Hanford rare plants, 2002. 2003. Florence Caplow.

Lacamas Prairie Natural Area Preserve: Assessment of Potential Recovery Actions for Lomatium bradshawii within the Lacamas Prairie Natural Area Preserve and Vicinity. 2018. Tynan Ramm-Granberg and F. Joseph Rocchio.

Lake Terrell: Rare Plant Survey of the Lake Terrell Wildlife Area. 2018. Walter Fertig.

Palouse Prairie: Site conservation planning: Palouse region atlas and floristic review. Appendix B: Palouse Atlas. 2009. Joseph Arnett.

Palouse Prairie: Site conservation planning: Palouse region atlas and floristic review. Appendix C. Palouse species lists. 2009. Joseph Arnett.

Puget Trough: Conservation Priorities for Rare Plant Species of Southern Puget Trough Prairies. 2018. Walter Fertig.

Ridgefield National Wildlife Refuge: Recovery Actions for Sidalcea nelsoniana (Nelson's checkermallow) and Lomatium bradshawii (Bradshaw's lomatium) at Ridgefield National Wildlife Refuge-2010. Joseph Arnett, Rex C. Crawford, and F. Joseph Rocchio.

Southwestern Washington Prairies: using GIS to find rare plant habitat in historic prairies. 2004. Florence Caplow and Janice Miller.

Southwest Washington Prairies: Vegetation/Landuse Map of Potential Habitat of Southwest Washington Prairie Species. 2013. Rex C. Crawford.

Washington: Climate Change Vulnerability Index Reports for Selected Washington State Rare Plant Species: Phase IV. 2024. Sienna Wessel and Molly Wiebush.

Washington: Climate Change Vulnerability Index Reports for Selected Washington State Rare Plant Species: Phase III. 2023. Jesse Miller, Irene Weber, Tynan Ramm-Granberg and Walter Fertig.

Washington: Climate Change Vulnerability Index Reports for Selected Washington State Rare Plant Species: Phase II. 2022. Walter Fertig.

Washington: Climate Change Vulnerability Index Reports for Selected Washington State Rare Plant Species. 2020. Walter Fertig.

Washington: Developing an Absence Database for Observational Data. 2021. Jake Kleinknecht and Walter Fertig.

Washington: Pollinators of Federally Listed Plant Species in Washington. 2014. John Fleckenstein.

Washington: Potential Federal Candidate Plant Species of Washington. 2020. Walter Fertig

Washington: Status of Federally Listed and Recently Delisted Plant Taxa in Washington State. 2025. Jesse Miller and Sienna Wessel.

Washington: Status of Federally Listed Plant Taxa in Washington State. 2021. Walter Fertig.

Washington: Status of Federally Listed Plant Taxa in Washington State, 2018. 2019. Walter Fertig.

Washington: Status of Federally Listed Plant Taxa in Washington State, 2017. 2018. Walter Fertig.

Washington's Pacific coast: Baseline inventory of rare, threatened, and endangered plant species/communities along Washington's Pacific coast. 1982. Linda M. Kunze and Lynn C. Cornelius.

Wenatchee Mountains: Review of endemic plants of the Wenatchee Mountains and adjacent areas. 2012. Joseph Arnett.