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Leguminosae: Astragalus robbinsii

Astragalus robbinsii

After Imbibment

Astragalus robbinsii


Astragalus robbinsii

Original Distribution

US, Oregon and Washington


Sandy ground, on dunes or eroded riverbanks at low elevations. Such sites typically have low vegitative cover.

Extinction Data

American Government Listed Endangered. IUCN Extinct Listed 1989, Listed Extinct by WCMC 1996


Perennial herb is sprawling or densely matted and up to 16cm long. The stems are branching, woody at the base, and almost gray or white due to short fine hairs. The internodes are mostly less than 8mm long. The leaflets hairy on both sides. The lowest stipules are short and fused at the base. the Leaves have 5-7 linear-lanceolate leaflets, each with a small spine at the tip of the leaf. The calyx is 4.7-5.2mm long; the tube is 2.3mm long with small spiny teeth that are 2-3mm long. The petals are whitish. The upper petals are narrowly egg shaped and about 6mm long by 4mm wide. The 2-seeded pods are lanceolate in profile, very slightly incurved, 5mm long and 2mm in diameter

Seed Data

7 Seeds Collected and grown at 20 C

Kew Herbcat Barcode Number


Other Information

Last seen in 1893. Habitat was destroyed by the flooding after the building of a dam in the Winooski River.Ayensu, E.S. and DeFilipps, R. A. (1978)

Information Sources

 Endangered and threatened plants of the united states. Smithsonian institution and World Wildlife fund. pp 66.Prance 1976: 33Walter, K.S. and Gillett, H.J. (eds) (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre IUCN The World Conservation Union, Gland, Switzerland and Cambridge, UK, Extinct Plant Species of the World IUCN Survey and preliminary report: April 1989