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World Checklist of Selected Plant Families (WCSP)

Achnatherum occidentale subsp. pubescens (Vasey) 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 viridula var. pubescens Vasey, Contr. U.S. Natl. Herb. 3: 50 (1892).

Stipa elmeri Piper & Brodie, Bull. Div. Agrostol. U.S.D.A. 11: 46 (1898).

Stipa occidentalis var. pubescens (Vasey) J.R.Maze, Roy L.Taylor & MacBryde, Canad. J. Bot. 56: 193 (1978).

* Basionym/Replaced Synonym

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