Lemmon's Needlegrass: Achnatherum lemmonii ssp. lemmonii (Synonyms: Achnatherum lemmonii var. lemmonii, Stipa columbiana var. columbiana, Stipa lemmonii var. jonesii, Stipa lemmonii var. lemmonii) - Found around the southern fringes of Mt. Adams country.
Columbia Needlegrass, Dore's Needlegrass, Nelson's Needlegrass: Achnatherum nelsonii ssp. dorei (Synonyms: Stipa nelsonii ssp. dorei, Stipa occidentalis var. dorei) -
Common Western Needlegrass, Hairy Needlegrass, Pubescent Western Needlegrass, Western Needlegrass: Achnatherum occidentale ssp. pubescens (Synonyms: Stipa elmeri, Stipa occidentalis var. pubescens) -
Thurber's Needlegrass, Thurber's Rice Grass: Achnatherum thurberianum (Synonym: Stipa thurberiana) - Collected at Peterson Prairie west of Trout Lake, WA.