Menyanthaceae
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Menyanthaceae is a family of aquatic and wetland plants in the order Asterales. There are approximately 60-70 species in six genera distributed worldwide. The simple or compound leaves arise alternately from a creeping rhizome. In the submersed aquatic genus Nymphoides, leaves are floating and support a lax, umbellate or racemose inflorescence. In other genera the inflorescence is erect and consists of one (e.g., Liparophyllum) to many flowers. The sympetalous, insect-pollinated flowers are five-parted and either yellow or white. The petals are ciliate or adorned with lateral wings. Fruit type is a capsule.
Species of Menyanthaceae are found worldwide. The genera Menyanthes and Nephrophyllidium grow only in the northern hemisphere, while Liparophyllum and Villarsia occur only in the southern hemisphere. Nymphoides species have a cosmopolitan distribution.
Menyanthaceae species are of economic importance as ornamental water garden plants, with Nymphoides being most commonly traded. The practice of growing non-native water plants has led to several species becoming naturalized or invasive.
Dimorphic heterostyly occurs in all genera but Liparophyllum. In addition, four species of Nymphoides are dioecious.[1]
Genera
Plants of the World Online accepts the following genera:[2]
- Liparophyllum Hook.f.
- Menyanthes L.
- Nephrophyllidium Gilg
- Nymphoides Ség.
- Ornduffia Tippery & Les
- Villarsia Vent.
References
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External links
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