Heterotheca vespertina
Annotated by Nesom, 2017.

Washington: Kittitas County: Priest Rapids Reservoir of Columbia River. Railroad Island, west of Beverly at north end of Sentinel Gap. Elev. 510 ft.
T16N R23E S33 SW
Datum: NAD 27. Uncertainty: 800 meters. Coordinate Source: TRS2LL.
In sand among cobbles on southern end of island. Assoc.: Purshia tridentata, Eriogonum compositum, Rosa woodsii, Oryzopsis hymenoides. Sprawling.

Joy Mastrogiuseppe 7160, Apr 7, 1992
With Kari Robsen, Donna Wilcox, Darrell Pock
ID, Accession: 140317, Barcode: ID146713