* Big-leaf Maple: Acer macrophyllum
* Miner's Lettuce: Montia perfoliata
* Cutleaf Tansymustard: Descurainia incisa ssp. incisa - MP 115.6
* Pale Wallflower: Erysimum occidentale - MP 91.7 & MP 115.6
Hairy Milk-vetch: Astragalus inflexus - Probably in bloom east of Roosevelt, WA
* Yakima Milk-vetch: Astragalus reventiformis - East of US 97
* The Dalles Milk-vetch: Astragalus sclerocarpus - MP 115.6
Columbia Milk-vetch: Astragalus succumbens - Nearing bloom east of road to Wishram & possibly in bloom east of Roosevelt, WA
* Columbia Gorge Lupine: Lupinus latifolius var. latifolius - East of Wishram Heights
* Filaree: Erodium cicutarium
* Fern-leaf Desert Parsley: Lomatium dissectum
* Biscuit-root: Lomatium macrocarpum
* Long-leaf Phlox: Phlox longifolia - MP 91.7
* Rigid Fiddleneck: Amsinckia retrorsa - MP 115.6
Sand-dune Penstemon: Penstemon acuminatus - Nearing bloom at MP 115.6
* Oregon Sunshine: Eriophyllum lanatum - Beginning to bloom east of Wishram Heights