The Hydatellales reference article from the English Wikipedia on 24-Jul-2004
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Hydatellales

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Kingdom Plantae (plants)
Division Magnoliophyta (flowers)
Class Liliopsida (monocotyledons)
Order Hydatellales

A small order of monocot flowering plants, including one family, the Hydatellaceae. Newer classification systems, including the Angiosperm Phylogeny Group's APG II system, include the Hydatellaceae in order Poales.