Genus Achnatherum (25):

• Lemmon's needlegrass (Achnatherum lemmonii var. lemmonii)
• Pubescent lemmon's needlegrass (Achnatherum lemmonii var. pubescens)
• Little parish's needlegrass (Achnatherum parishii var. depauperatum)
• Parish's needlegrass (Achnatherum parishii var. parishii)
• Wallowa needlegrass (Achnatherum wallowaensis)
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Famili Poaceae (13327):

• Arcuate barley (× Elyhordeum arcuatum)
• Dakota barley (× Elyhordeum dakotense)
• Iowa barley (× Elyhordeum iowense)
• Macoun's barley (× Elyhordeum macounii)
• Mountain barley (× Elyhordeum montanense)
• Schaack's barley (× Elyhordeum schaackianum)
• Stebbins' barley (× Elyhordeum stebbinsianum)
• Purple wildrye (× Elyleymus aristatus)
• Colville wildrye (× Elyleymus colvillensis)
• Turner wildrye (× Elyleymus turneri)
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