Callitrichales
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Callitrichales Dumoert; 1829 is an order of flowering plants, whose flowers have a single stamen. As circumscribed by American botanist Arthur Cronquist in the Cronquist system, the order included the families Hippuridaceae, Callitrichaceae, and Hydrostachyaceae.
The order is not recognized by the Angiosperm Phylogeny Group; Hydrostachyaceae is placed in Cornales and Hippuridaceae and Callitrichaceae are included in Plantaginaceae (Lamiales).