| Scientific Name | Allium constrictum (Ownbey & Mingrone) P. M. Peterson, Annable & Rieseberg |
| Family | Amaryllidaceae |
| Common Names | Grand Coulee onion |
| Eastern Washington | Native |
| Conservation Status | State of Washington: SENSITIVE (S2S3); Location Hidden |
| Notes | Washington endemic |
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Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 6/5/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 6/5/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 6/5/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 4/26/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 5/19/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 6/5/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 6/5/2014 
Douglas Co.; (locality and coordinates withheld; status: Washington State sensitive, BLM sensitive taxon); 5/19/2014
