''Najas'', the water-nymphs or naiads, is a
genus
Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...
of
aquatic plant
Aquatic plants, also referred to as hydrophytes, are vascular plants and Non-vascular plant, non-vascular plants that have adapted to live in aquatic ecosystem, aquatic environments (marine ecosystem, saltwater or freshwater ecosystem, freshwater ...
s. It is
cosmopolitan
Cosmopolitan may refer to:
Internationalism
* World citizen, one who eschews traditional geopolitical divisions derived from national citizenship
* Cosmopolitanism, the idea that all of humanity belongs to a single moral community
* Cosmopolitan ...
in distribution, first described for modern science by
Linnaeus
Carl Linnaeus (23 May 1707 – 10 January 1778), also known after ennoblement in 1761 as Carl von Linné,#Blunt, Blunt (2004), p. 171. was a Swedish biologist and physician who formalised binomial nomenclature, the modern system of naming o ...
in 1753. Until 1997, it was rarely placed in the
Hydrocharitaceae,
[Angiosperm Phylogeny Group (2003). "An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG II". ''Botanical Journal of the Linnean Society'' 141(4): 399-436. (Available online]
Abstract
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and was often taken as constituting (by itself) the family Najadaceae.
197. Najadaceae A. L. de Jussieu
''Flora of North America
The ''Flora of North America North of Mexico'' (usually referred to as ''FNA'') is a multivolume work describing the native plants and naturalized plants of North America, including the United States, Canada, St. Pierre and Miquelon, and Greenla ...
''
The APG II system
The APG II system (Angiosperm Phylogeny Group II system) of plant classification is the second, now obsolete, version of a modern, mostly Molecular phylogenetics, molecular-based, list of systems of plant taxonomy, system of plant taxonomy that ...
, of 2003 (unchanged from the APG system
The APG system (Angiosperm Phylogeny Group system) of plant classification is the first version of a modern, mostly molecular-based, system of plant taxonomy. Published in 1998 by the Angiosperm Phylogeny Group, it was replaced by the improved ...
, of 1998), places the genus in family Hydrocharitaceae, in the order Alismatales of the monocots
Monocotyledons (), commonly referred to as monocots, ( Lilianae '' sensu'' Chase & Reveal) are flowering plants whose seeds contain only one embryonic leaf, or cotyledon. A monocot taxon has been in use for several decades, but with various ranks a ...
.[Ito, Y., Nr. Tanaka, S.W. Gale, O. Yano, J. Li (2017) "Phylogeny of Najas (Hydrocharitaceae) revisited: Implications for systematics and evolution". ''Taxon'' 66(2): 309-323]
doi: 10.12705/662.2
/ref>
;Species[
# '' Najas affinis'' Rendle - South America, Senegal, Guinea-Bissau
# '' Najas ancistrocarpa'' A.Braun ex Magnus - China, Japan, Taiwan
# '' Najas arguta'' Kunth - Cuba, Costa Rica, Panama, South America
# '' Najas australis'' Bory ex Rendle - India, Madagascar, Mauritius, KwaZulu-Natal, Seychelles
# '' Najas baldwinii'' Horn - West Africa
# '' Najas brevistyla'' Rendle - Assam
# '' Najas browniana'' Rendle - southern China, India, Taiwan, Java, Cavern Island in Northern Territory of Australia
# '' Najas chinensis'' N.Z.Wang - Primorye, China, Taiwan, Japan
# '' Najas conferta'' (A.Braun) A.Braun - Cuba, Hispaniola, Panama, Brazil
# '' Najas faveolata'' A. Br. ex Magnus
# '' Najas filifolia'' R.R.Haynes - southeastern United States (Georgia, Alabama, Florida)
# '' Najas flexilis'' (Willd.) Rostk. & W.L.E. Schmidt - temperate Northern Hemisphere
# '' Najas gracillima'' (A.Braun ex Engelm.) Magnus - Asia, North America
# '' Najas graminea'' Delile - Africa, Asia, New Guinea, Melanesia, northern Australia; naturalized in California and parts of Europe
# '' Najas grossareolata'' L.Triest - Sri Lanka
# '' Najas guadalupensis'' (Spreng.) Magnus - North and South America, Caribbean
# '' Najas hagerupii'' Horn - Ghana, Mali
# '' Najas halophila'' L.Triest - Java, New Guinea, Queensland
# '' Najas heteromorpha'' Griff. ex Voigt - eastern India
# '' Najas horrida'' A.Braun ex Magnus - Africa, Madagascar, Sinai
# '' Najas indica'' (Willd.) Cham. - Indian Subcontinent, China, Southeast Asia, New Guinea
# '' Najas kurziana '' Rendle - Bihar, East Timor
# '' Najas madagascariensis'' Rendle - Madagascar; naturalized in Mauritius
# '' Najas malesiana'' W.J.de Wilde - India, Bangladesh, Indochina, Malaysia, Indonesia, Philippines; naturalized in eastern Brazil
# '' Najas marina'' L. - widespread and nearly cosmopolitan
# '' Najas minor'' All. - widespread in Europe, Asia, Africa; naturalized in eastern North America
# '' Najas oguraensis'' Miki - East Asia, Himalayas (Pakistan, Nepal, northern India)
# '' Najas pectinata'' (Parl.) Magnus - Sahara
# '' Najas pseudogracillima'' L.Triest - Hong Kong
# '' Najas rigida'' Griff. - eastern India
# '' Najas schweinfurthii'' Magnus - Senegal, Cameroon, Ethiopia, Sudan, Tanzania
# '' Najas tenuicaulis'' Miki - Honshu Island in Japan
# '' Najas tenuifolia'' R.Br. - Hong Kong, Southeast Asia, Australia
# '' Najas tenuis'' Magnus – India, Sri Lanka, Myanmar
# '' Najas tenuissima'' (A.Braun ex Magnus) Magnus - Finland, Russia, Hokkaido
# '' Najas testui'' Rendle - western + central Africa
# '' Najas welwitschii'' Rendle - tropical Africa, western India
# '' Najas wrightiana'' A.Braun - Mexico, Central America, Cuba, Bahamas, Venezuela; naturalized in Florida
]
References
External links
Najadaceae
in L. Watson and M.J. Dallwitz (1992 onwards
''The families of flowering plants''
: descriptions, illustrations, identification, information retrieval. Version: 9 March 2006. http://delta-intkey.com .
Flavon's art gallery
Najadaceae of Mongolia in FloraGREIF
{{Authority control
Aquatic plants
Hydrocharitaceae genera
Taxa named by Carl Linnaeus