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World Checklist of Selected Plant Families (WCSP)

Achnatherum occidentale subsp. californicum (Merr. & Burtt Davy) Barkworth, Phytologia 74: 10 (1993).

This name is a synonym.

Accepted Name: Stipa occidentalis Thurb. ex S.Watson, Botany [Fortieth Parallel]: 380 (1871).
Family: Poaceae
The Poaceae generic classification system originated from the GrassBase database, originally based on Genera Graminum (1985). Work is in progress to update this to a new globally accepted and collaborative generic classification based on the latest research.
Homotypic Names:

* Stipa californica Merr. & Burtt Davy, Univ. Calif. Publ. Bot. 1: 63 (1902).

Stipa occidentalis var. californica (Merr. & Burtt Davy) C.L.Hitchc., Vasc. Pl. Pacif. N. W. 1: 715 (1969).

* Basionym/Replaced Synonym

Original Compiler: W.D.Clayton, R.Govaerts, K.T.Harman, H.Williamson & M.Vorontsova