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World Checklist of Selected Plant Families (WCSP)

Orthopogon retzii (Retz.) Spreng., Syst. Veg., 1: 307 (1824).

This name is a synonym.

Accepted Name: Echinochloa oryzoides (Ard.) Fritsch, Verh. K. K. Zool.-Bot. Ges. Wien 41: 742 (1891).
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:

* Panicum hispidulum Retz., Observ. Bot. 5: 18 (1789).

Digitaria hispidula (Retz.) Willd., Enum. Pl.: 91 (1809).

Oplismenus hispidulus (Retz.) Kunth, Révis. Gramin. 1: 44 (1829).

Echinochloa hispidula (Retz.) Nees in J.F.Royle, Ill. Bot. Himal. Mts.: 416 (1840).

Panicum crus-galli var. hispidulum (Retz.) Hack., Bull. Herb. Boissier 7: 644 (1899).

Echinochloa crus-galli var. hispidula (Retz.) Honda, Bot. Mag. (Tokyo) 37: 122 (1923).

Echinochloa crus-galli subsp. hispidula (Retz.) Honda, J. Fac. Sci. Univ. Tokyo, Sect. 3, Bot. 3: 267 (1930).

* Basionym/Replaced Synonym

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