Astragalus kentrophyta douglasii Barneby (1964:364)

Douglas' milk-vetch, Douglas’s thistle milkvetch, Barneby's thistle milk-vetch, Douglas's kentrophyta

Taxonomy & Nomenclature

Synonym/s: Astragalus kentrophyta subsp. douglasii (Barneby) W.A.Weber in Phytologia 53: 187 (1983)

Conservation Status

Extinct (Fertig, 2021:7-8; Knapp et al., 2021; POWO, 2024; Christenhusz & Govaerts, 2025; NatureServe, 2026)

Last record: June 1883 (Siddall et al., 1979:27 [as 1883]; Fertig, 2021:8; Knapp et al., 2021 [as 1883]; Christenhusz & Govaerts, 2025 [as 1883]; NatureServe, 2026 [as 1883])

Distribution & Habitat

Oregon & Washington

Biology & Ecology

Hypodigm

Media

References

Original scientific description:

Bameby, R. L. (1964). Atlas of the North American Astragalus. Memoirs of the New York Botanical Garden, Vol. 13, Part III. The New York Botanical Garden, New York.

Other references:

Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2025). Plant extinction in the Anthropocene. Botanical Journal of the Linnean Society 207(3): 183-196. https://doi.org/10.1093/botlinnean/boae045 [Appendix S1]

Fertig, Walter. (2021). What Ever Happened to Taylor’s Draba? The Search for Historical and Extirpated Plants in Washington. Douglasia 45(1): 7-13.

Flora of North America Editorial Committee (FNA). (2023). Flora of North America north of Mexico. Vol. 11. Magnoliophyta: Fabaceae, parts 1+2. Oxford Univ. Press, New York. xxvii + 1108 pp.

Hitchcock, C. L., Cronquist, A., Ownbey, M., Thompson, J. W. (1961). Vascular Plants of the Pacific Northwest Part 3: Saxifragaceae to Ericaceae. University of Washington Press, Seattle, WA. 614 pp.

Isely, D. (1998). Native & naturalized Leg. of the USA. Brigham Young Univ. Utah.

Kagan, Jimmy and Vrilakas, Susan. (1993). Extinct and Extirpated Plants from Oregon. Kalmiopsis [1993]: 12-16.

Kartesz, J. T. (1994). A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Knapp, Wesley M., Frances, Anne, Noss, Reed, Naczi, Robert F. C., Weakley, Alan, Gann, George D., Baldwin, Bruce G., Miller, James, McIntyre, Patrick, Mishler, Brent D., Moore, Gerry, Olmstead, Richard G., Strong, Anna, Kennedy, Kathryn, Heidel, Bonnie and Gluesenkamp, Daniel. (2021). Vascular plant extinction in the continental United States and Canada. Conservation Biology 35(1): 360-368. https://doi.org/10.1111/cobi.13621 [Supporting Information (Appendix S1)]

NatureServe. (2026). Astragalus kentrophyta var. douglasii: Douglas's Kentrophyta. NatureServe Network Biodiversity Location Data accessed through NatureServe Explorer [web application]. NatureServe, Arlington, Virginia. Available at: https://explorer.natureserve.org/ [Accessed on 26 September 2026]

Oregon Natural Heritage Program. (2001). Rare, Threatened and Endangered Plants and Animals of Oregon. Oregon Natural Heritage Program, Portland, Oregon. 94 pp. (98 pp. PDF).

POWO. (2024). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 12 July 2024]

Siddall, Jean L., Chambers, Kenton L. and Wagner, David H. (1979). Rare, threatened and endangered vascular plants in Oregon — an interim report. Oregon Natural Area Preserves Advisory Committee, Division of State Lands. 109 pp.

Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.

Weinmann, F., Zika, P. F., Giblin, D. E. and Legler, B. (2002+). Checklist of the Vascular Plants of Washington State. University of Washington Herbarium. http://biology.burke.washington.edu/herbarium/waflora/checklist.php

http://citeseerx.ist.psu.edu/viewdoc/download?rep=rep1&type=pdf&doi=10.1.1.214.3747

https://vanishingflora.proboards.com/thread/3963/astragalus-kentrophyta-douglasii