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Hydatellaceae
Hydatellaceae are a family of small, aquatic flowering plants. The family consists of tiny, relatively simple, plants occurring in Australasia and India. It was formerly considered to be related to the grasses and sedges (order Poales), but has been reassigned to the order Nymphaeales as a result of DNA and morphological analyses showing its closer affinity to basal angiosperms than to the order Poales, to which it bears a superficial resemblance. The family includes only the genus ''Trithuria''.
== Description ==
The family consists of ten or more species with substantial variation among them.〔 Plants are submerged and emergent aquatic annuals, rooted in the substrate below the water. They are tiny (a few cm tall) and relatively simple. The simple leaves are concentrated basally around a short stem.
The members of this plant family are monoecious or dioecious and are likely wind-pollinated (anemophilous), water-pollinated (hydrophilous) or self-pollinating (autogamous). Flower-like reproductive units are composed of small collections of minute stamen- and/or pistil-like structures that may each represent very reduced individual flower, so that the reproductive units may be pseudanthia. The non-fleshy fruits are follicles or achenes.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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