Astragalus kentrophyta douglasii Barneby

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



Taxonomy & Nomenclature



Conservation Status

Extinct (Fertig, 2021:7-8; Knapp et al., 2021)

Last record: June 1883 (Fertig, 2021:8; Knapp et al., 2021 [as 1883])



Oregon & Washington


Biology & Ecology










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:

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

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

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

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. [Supporting Information (Appendix S1)]

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.