| Name | Achnatherum occidentale (Thurber ex S. Watson) Barkworth |
| Authorship | (Thurber ex S. Watson) Barkworth |
| Rank | Species |
| Placed in | Achnatherum |
| Contains | Achnatherum occidentale subsp. californicum (Burtt Davy & Merrill) Barkworth Achnatherum occidentale subsp. pubescens (Vasey) Barkworth |
| Holdings | 33 Specimens held in the Harvard University Herbaria identified as Achnatherum occidentale (Thurber ex S. Watson) Barkworth |
| Identification made in | [no date] (32), 2000 (1) |