Potamogetonaceae

Taxobox
name = Potamogetonaceae

---

image_width = 240px
image_caption = "Potamogeton crispus"
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Alismatales
familia = Potamogetonaceae
familia_authority = Rchb.
subdivision_ranks = Genera
subdivision = See text

Potamogetonaceae is a family of monocotyledonous flowering plants in the order Alismatales, with a cosmopolitan distribution.

The APG system (1998) and APG II system (2003) places it in the clade monocots. Their concept of the family includes the plants sometimes treated as family Zannichelliaceae, but to exclude the genus "Ruppia". So circumscribed, the family consists of seven genera (notably "Potamogeton"), totalling about 90 species of perennial aquatic plants. Their leaf blades can be either floating or submersed, and their stems are often joined. The flowers are tetramerous: the floral formula (sepals; petals; stamens; carpels) is [4;0;4;4] . The plants have no petals. The fruit consists of 1-4 drupelets or achenes.

Genera

*"Althenia"
*"Groenlandia"
*"Lepilaena"
*"Potamogeton"
*"Pseudalthenia"
*"Stuckenia"
*"Zannichellia"

References

*Watson, L. & Dallwitz, M.J. (1992 onwards). [http://delta-intkey.com/angio/www/Potamoge.htm Potamogetonaceae] , [http://delta-intkey.com/angio/www/zanniche.htm Zannichelliaceae] in The families of flowering plants
*Germplasm Resources Information Network: [http://www.ars-grin.gov/cgi-bin/npgs/html/gnlist.pl?916 Potamogetonaceae]
*Flora of North America: [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=10726 Potamogetonaceae] , [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=10959 Zannichelliaceae]
*NCBI Taxonomy Browser [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Tree&id=16362&lvl=3&lin=f&keep=1&srchmode=1&unlock Potamogetonaceae]