Potamogetonaceae
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 Potamogeton crispus
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Potamogetonaceae is the botanical name of a family of flowering plants. This family has long been recognized by taxonomists.
The APG II system, of 2003 (unchanged from the APG system, of 1998), also recognizes this family and places it in the order Alismatales, in the clade monocots. The family is then taken to include the plants sometimes treated as family Zannichelliaceae, but to exclude the genus Ruppia.
Thus circumscribed, the family consists of several genera (notably Potamogeton), totalling several dozen species, perennial aquatic plants. Their leaf blades can be either floating or submersed, and their stems are often joined. Flowers are tetramerous: the floral formula is [4;0;4;4] (floral formula = sepals; petals; stamens; carpels). The plants have no petals. The fruit consists of 1-4 drupelets or achenes.
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Wikimedia Commons has media related to: |
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- Potamogetonaceae, Zannichelliaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. Version: 27th April 2006. http://delta-intkey.com
- Potamogetonaceae, Zannichelliaceae in Flora of North America
- NCBI Taxonomy Browser
- links and more links at CSDL, Texas
