Potamogetonaceae


































Potamogetonaceae

PotamogetonCrispus.jpg

Potamogeton crispus

Scientific classification edit
Kingdom:
Plantae

Clade:
Angiosperms

Clade:
Monocots
Order:
Alismatales
Family:
Potamogetonaceae
Rchb.[1]
Genera

See text



The Potamogetonaceae, commonly referred to as the pondweed family, are an aquatic family of monocotyledonous flowering plants. The roughly 110 known species are divided over six genera (Christenhusz & Byng 2016 [2]). The largest genus in the family by far is Potamogeton, which contains about 100 species.


The family has a subcosmopolitan distribution, and is considered to be one of the most important angiosperm groups in the aquatic environment because of its use as food and habitat for aquatic animals.[3]




Contents






  • 1 Taxonomy


  • 2 Characteristics


  • 3 Genera


  • 4 References


  • 5 External links





Taxonomy


The Potamogetonaceae are currently placed in the early diverging monocot order Alismatales by the Angiosperm Phylogeny Group.[1] Their concept of the family includes the plants sometimes treated in the separate family Zannichelliaceae, but excludes the genus Ruppia. So circumscribed, the family currently consists of six genera: Althenia, Groenlandia, Lepilaena, Potamogeton, Stuckenia, and Zannichellia,[4] totalling about 120 species of perennial aquatic plants.


Marine grasses families: Zosteraceae, Cymodoceaceae, Ruppiaceae and Posidoniaceae. Related families: Potamogetonaceae and (and sometimes including) Zannichelliaceae.













































































Families and Genera crosses (Sea grasses)
Kubitzki (ed. 1998[5])
 Watson & Dallwitz (delta-intkey)[6]
 data.kew[7]
 APWeb (mobot.org)[8]

Zosteraceae
1. Zostera L. Zostera
Zostera L.
Zostera L. (including Heterozostera den Hartog, Macrozostera Tomlinson & Posluzny, Nanozostera Tomlinson & Posluzny, Zosterella J. K. Small)
2. Heterozostera den Hartog Heterozostera
Heterozostera (Setch.) Hartog		 (in Zostera)
3. Phyllospadix Hook. Phyllospadix
Phyllospadix Hook.
Phyllospadix J. D. Hooker

Cymodoceaceae
1. Syringodium Kütz
 Syringodium
Syringodium Kutz.		 (in Cymodocea)
2. Halodule Endl. Halodule
Halodule Endl.
Halodule Endlicher
3. Cymodocea König Cymodocea
Cymodocea K.Koenig (including Phycoschoenus (Asch.) Nakai )
Cymodocea König (including Amphibolis Agardh ?, Syringodium Kütz. ?, Thalassodendron den Hartog ?)
4. Amphibolis Agardh Amphibolis
Amphibolis C.Agardh (including Pectinella J.M.Black)		 (in Cymodocea)
5. Thalassodendron de Hartog (name not found)
Thalassodendron Hartog		 (in Cymodocea)

Ruppiaceae

Ruppia L.		 Ruppia (in Ruppia L. in Potamogetonaceae)
Ruppia L.

Posidoniaceae

Posidonia König		 Posidonia
Posidonia K.Koenig
Posidonia König

















































































Families and Genera crosses (Potamogetonaceae)
Kubitzki (ed. 1998[5])
 Watson & Dallwitz (delta-intkey)[9]
 data.kew[10]
 APWeb (mobot.org)[11]
Potamogetonaceae
1. Potamogeton L. Potamogeton
Potamogeton L.
Potamogeton L. (including Coleogeton Les & Haynes, Stuckenia Börner)
2. Groenlandia J. Gray Groenlandia
Groenlandia J.Gay
Groenlandia J. Gay
(in Ruppia in Ruppiaceae) (in Ruppia in Ruppiaceae)
Ruppia L.		 (in Ruppia in Ruppiaceae)
(in Althenia: Zannichelliaceae and Lepilaena: Zannichelliaceae) (in Althenia: Zannichelliaceae and Lepilaena: Zannichelliaceae) (in Althenia F.Petit: Zannichelliaceae and Lepilaena J.L.Drumm. ex Harv.:Zannichelliaceae)
Althenia Petit (including Lepilaena Harvey)
(in Pseudalthenia including Vleisia: Zannichelliaceae) (in Pseudalthenia: Zannichelliaceae and Vleisia: Zannichelliaceae) (Pseudalthenia not found, Vleisia Toml. & Posl.: Zannichelliaceae)
Pseudalthenia Nakai (including Vleisia Tomlinson & Posluszny)
(in Zannichellia L.: Zannichelliaceae) (in Zannichellia: Zannichelliaceae) (in Zannichellia L.: Zannichelliaceae)
Zannichellia L.

Zannichelliaceae
1. Zannichellia L. Zannichellia
Zannichellia L.		 (in Zannichellia L.: Potamogetonaceae)
2. Pseudalthenia Nakai (including Vleisia)
Pseudalthenia (excluding Vleisia)		 (name not found) (in Pseudalthenia: Potamogetonaceae)
3. Althenia Petit (excluding Lepilaena Drumm. ex. Harv.)
Althenia (excluding Lepilaena)
Althenia F.Petit (excluding Lepilaena J.L.Drumm. ex Harv.)
Althenia Petit (including Lepilaena Harvey)
4. Lepilaena Drumm. ex. Harv. Lepilaena
Lepilaena J.L.Drumm. ex Harv.		 (in Althenia Petit)
(in Pseudalthenia) Vleisia
Vleisia Toml. & Posl.		 (in Pseudalthenia: Potamogetonaceae)



Characteristics


The plants are all aquatic perennial herbs, often with creeping rhizomes and leafy branches. Their leaf blades can be either floating or submerged, and their stems are often joined. No stomata are present on the leaves. The flowers are tetramerous: the floral formula (sepals; petals; stamens; carpels) is [4;0;4;4]. The flowers have no petals. The fruit consists of one to four drupelets or achenes.[12]



Genera



  • Althenia

  • Groenlandia

  • Lepilaena

  • Potamogeton

  • Pseudalthenia

  • Stuckenia

  • Zannichellia



References





  1. ^ ab Angiosperm Phylogeny Group (2009). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III" (PDF). Botanical Journal of the Linnean Society. 161 (2): 105–121. doi:10.1111/j.1095-8339.2009.00996.x. Retrieved 2013-06-26..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"""""""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}


  2. ^ Christenhusz, M. J. M. & Byng, J. W. (2016). "The number of known plants species in the world and its annual increase". Phytotaxa. Magnolia Press. 261 (3): 201–217. doi:10.11646/phytotaxa.261.3.1.


  3. ^ Haynes, R. R. 1975. A revision of North American Potamogeton subsection Pusilli (Potamogetonaceae). Rhodora 76: 564--64


  4. ^ Nunes, E.L.P., de Lima, M.C., Coan, A.I., de Chiara Moco, M.C. (2010). Contribution to the embryology of Potamogeton L. (Alismatales, Potamogetonaceae). Aquatic Botany, 93: 32-38.


  5. ^ ab Kubitzki (ed.) 1998. The families and genera of vascular plants, vol 4, Monocotyledons: Alismatanae and Commelinanae (except Gramineae). Springer-Verlag, Berlin.


  6. ^ Watson & Dallwitz. Zosteraceae. The families of flowering plants. http://delta-intkey.com/angio/www/zosterac.htm


  7. ^ Vascular Plant Families and Genera. List of genera in family CYMODOCEACEAE (accessed 2016-06-02) http://data.kew.org/cgi-bin/vpfg1992/genlist.pl?CYMODOCEACEAE


  8. ^ VASCULAR PLANT FAMILIES and GENERA. List of Genera in CYMODOCEACEAE (accessed 2016-06-02) http://www.mobot.org/mobot/research/apweb/orders/alismatalesweb.htm#Cymodoceaceael


  9. ^ Watson & Dallwitz. Potamogetonaceae. The families of flowering plants. http://delta-intkey.com/angio/www/potamoge.htm


  10. ^ Vascular Plant Families and Genera. List of genera in family POTAMOGETONACEAE (accessed 2016-06-02) http://data.kew.org/cgi-bin/vpfg1992/genlist.pl?POTAMOGETONACEAE


  11. ^ VASCULAR PLANT FAMILIES and GENERA. List of Genera in POTAMOGETONACEAE (accessed 2016-06-02) http://www.mobot.org/mobot/research/apweb/orders/alismatalesweb.htm#Potamogetonaceae


  12. ^ Watson, L., and Dallwitz, M.J. (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, and information retrieval. Version: 21 March 2010. http://delta-intkey.com/angio/www/potamoge.htm




External links



  • Angiosperm Phylogeny Website


  • Potamogetonaceae at the DELTA Online Families of Flowering Plants


  • Potamogetonaceae at the Germplasm Resources Information Network


  • Potamogetonaceae at the Online Flora of North America


  • Zannichelliaceae at the Online Flora of North America


  • Potamogetonaceae at the NCBI Taxonomy Browser














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