Achnatherum nelsonii subsp. longiaristatum (Barkworth & J.R. Maze) Barkworth

Achnatherum nelsonii subsp. longiaristatum (Barkworth & J.R. Maze) Barkworth is a synonym sensu FNA Ed. Comm., 2007 of:

Eriocoma occidentalis subsp. californica (Merrill & Burtt Davy) Romaschenko, an accepted subspecies name sensu Peterson et al., 2019a.