Tygh Valley Milkvetch / Center For Plant Conservation
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Tygh Valley Milkvetch (Astragalus tyghensis)

Tygh Valley milkvetch

Photo Credit: Kris Freitag
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Fabaceae
  • State: OR
  • Nature Serve ID: 146792
  • Lifeform: Forb/herb
  • Date Inducted in National Collection: 09/13/2022

Where is Tygh Valley Milkvetch (Astragalus tyghensis) located in the wild?

States & Provinces:

Tygh Valley Milkvetch can be found in Oregon

Which CPC Partners conserve Tygh Valley Milkvetch (Astragalus tyghensis)?

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

Kris Freitag
  • 09/15/2022
  • Seed Collection

As part of CPC's IMLS funded initiative to determine seed storage longevity in wild rare plant species, seed of Tygh Valley milkvetch (Astragalus tyghensis) was collected at a BLM site along the White River in central Oregon. This plant is found only in Oregon’s Wasco County, in sagebrush-bunchgrass communities. The spring’s unusually wet and cool weather may have affected seed set and certainly made it more difficult to judge when to collect. However, we managed to collect enough apparently good seed for the purpose. Each tough capsule had to be carefully pried open in the lab to extract the small bean-like seeds, so it was an especially laborious taxon to work with.

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Taxon Astragalus tyghensis
Authority M.E. Peck
Family Fabaceae
CPC Number 508
ITIS 25713
Duration Perennial
Common Names Tygh Valley Milk-vetch
Associated Scientific Names Astragalus tyghensis
State Rank
State State Rank
Oregon S2
Ecological Relationships


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