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World Checklist of Selected Plant Families (WCSP)

Helictotrichon asperum var. roylei (Hook.f.) R.R.Stewart, Brittonia 5: 432 (1945).

This name is a synonym.

Accepted Name: Trisetopsis virescens (Nees ex Steud.) Röser & A.Wölk, Taxon 66: 38 (2017).
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:

* Avena aspera var. roylei Hook.f., Fl. Brit. India 7: 276 (1896).

Avena roylei (Hook.f.) Keng, Bull. Fan Mem. Inst. Biol., Bot. 7: 36 (1936).

Helictotrichon roylei (Hook.f.) Keng, Clav. Gen. Sp. Gram. Prim. Sin.: 200 (1957).

* Basionym/Replaced Synonym

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