Stipa nelsonii var. longiaristata Barkworth & J. Maze

Stipa nelsonii var. longiaristata Barkworth & J. Maze is a synonym sensu Peterson et al., 2019a of:

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