California Danthonia, California Oatgrass, California Oat-grass, California Wild Oat-grass: Danthonia californica (Synonyms: Danthonia americana, Danthonia californica var. americana, Danthonia californica var. californica, Danthonia californica var. palousensis, Danthonia californica var. piperi) -
Timber Danthonia, Mountain Oatgrass, Timber Oat-grass, Timber Wild Oat-grass: Danthonia intermedia (Synonyms: Danthonia canadensis, Danthonia intermedia var. cusickii, Danthonia intermedia var. intermedia) -
Common Wild Oatgrass, Poverty Danthonia, Poverty Oat-grass, Poverty Wild Oat-grass: Danthonia spicata (Synonyms: Danthonia spicata var. longipila, Danthonia spicata var. pinetorum, Danthonia thermale, Danthonia thermalis) -
Onespike Danthonia, Few-flowered Wild Oatgrass, Few-flower Wild Oat-grass: Danthonia unispicata - ? Common in open forest along the middle and upper Klickitat River. Not listed as a Columbia River Gorge species.