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Astragalus tyghensis
Tygh Valley milkvetch is a rare perennial legume found only in the Tygh Valley of Wasco County, Oregon. It is a wild native rather than a common garden plant, and it needs well-drained, dry conditions with full sun.
Astragalus tyghensis is a species of flowering plant in the legume family known by the common name Tygh Valley milkvetch. It is endemic to Oregon in the United States, where it is known only from the Tygh Valley of Wasco County.
This species is a perennial herb growing from a stout taproot and a branching caudex. The plant forms mats or clumps, with stems growing prostrate or upright and up to 55 centimeters long. Most of the plant is covered in long, silky hairs. The leaves are divided into a number of leaflets each up to 1.7 centimeters long. The inflorescence is a raceme of up to 40 flowers. Each flower has a calyx of very hairy sepals and a pale yellow corolla up to 1.2 centimeters long. The fruit is a legume pod up to 0.7 centimeters long. The flowers are pollinated by insects, particularly bees, and the plant reproduces by seed.
Astragalus aboriginum · Rogue River milkvetch · Sharp-leaved Milk Vetch · Sharpkeel milkvetch · Humboldt County milkvetch · Purple milkvetch · Cushenbury milkvetch · Astragalus alopecurus · Alpine milkvetch · Crescent milkvetch · Hermit Milkvetch · Anderson's milkvetch
Text excerpted from the Wikipedia article Astragalus tyghensis by its contributors, under CC BY-SA 4.0; the excerpts and the care summary drawn from them are shared under the same licence.
The care summary was written by AI (Claude, Anthropic) from the sources on this page, with general growing knowledge where they are silent. Check before relying on it.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
