Najas

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Najas
Illustration Najas marina0.jpg
Najas marina [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Hydrocharitaceae
Subfamily: Hydrilloideae
Genus: Najas
L. (1753)
Synonyms [2]
  • FluvialisSég
  • CauliniaWilld.
  • IttneraC.C.Gmel.

Najas, the water-nymphs [3] or naiads, is a genus of aquatic plants. It is cosmopolitan in distribution, first described for modern science by Linnaeus in 1753. Until 1997, it was rarely placed in the Hydrocharitaceae, [4] [5] [6] [7] and was often taken as constituting (by itself) the family Najadaceae. [8]

The APG II system, of 2003 (unchanged from the APG system, of 1998), places the genus in family Hydrocharitaceae, in the order Alismatales of the monocots. [7]

An infrageneric classification of two sections is proposed: Section Americanae and sect. Caulinia. [9]

Species [2]
  1. Najas affinis Rendle - South America, Senegal, Guinea-Bissau
  2. Najas ancistrocarpa A.Braun ex Magnus - China, Japan, Taiwan
  3. Najas arguta Kunth - Cuba, Costa Rica, Panama, South America
  4. Najas australis Bory ex Rendle - India, Madagascar, Mauritius, KwaZulu-Natal, Seychelles
  5. Najas baldwinii Horn - West Africa
  6. Najas brevistyla Rendle - Assam
  7. Najas browniana Rendle - southern China, India, Taiwan, Java, Cavern Island in Northern Territory of Australia
  8. Najas chinensis N.Z.Wang - Primorye, China, Taiwan, Japan
  9. Najas conferta (A.Braun) A.Braun - Cuba, Hispaniola, Panama, Brazil
  10. Najas faveolata A. Br. ex Magnus
  11. Najas filifolia R.R.Haynes - southeastern United States (Georgia, Alabama, Florida)
  12. Najas flexilis (Willd.) Rostk. & W.L.E. Schmidt (1824) - temperate Northern Hemisphere
  13. Najas gracillima (A.Braun ex Engelm.) Magnus - Asia, North America
  14. Najas graminea Delile (1813) - Africa, Asia, New Guinea, Melanesia, northern Australia; naturalized in California and parts of Europe
  15. Najas grossareolata L.Triest - Sri Lanka
  16. Najas guadalupensis (Spreng.) Magnus - North and South America, Caribbean
  17. Najas hagerupii Horn - Ghana, Mali
  18. Najas halophila L.Triest - Java, New Guinea, Queensland
  19. Najas heteromorpha Griff. ex Voigt - eastern India
  20. Najas horrida A.Braun ex Magnus - Africa, Madagascar, Sinai
  21. Najas indica (Willd.) Cham. (1829) - Indian Subcontinent, China, Southeast Asia, New Guinea
  22. Najas kurziana Rendle - Bihar, East Timor
  23. Najas madagascariensis Rendle - Madagascar; naturalized in Mauritius
  24. Najas malesiana W.J.de Wilde - India, Bangladesh, Indochina, Malaysia, Indonesia, Philippines; naturalized in eastern Brazil
  25. Najas marina L. (1753) - widespread and nearly cosmopolitan
  26. Najas minor All. (1773) - widespread in Europe, Asia, Africa; naturalized in eastern North America
  27. Najas oguraensis Miki - East Asia, Himalayas (Pakistan, Nepal, northern India)
  28. Najas pectinata (Parl.) Magnus - Sahara
  29. Najas pseudogracillima L.Triest - Hong Kong
  30. Najas rigida Griff. - eastern India
  31. Najas schweinfurthii Magnus - Senegal, Cameroon, Ethiopia, Sudan, Tanzania
  32. Najas tenuicaulis Miki - Honshu Island in Japan
  33. Najas tenuifolia R.Br. - Hong Kong, Southeast Asia, Australia
  34. Najas tenuis Magnus – India, Sri Lanka, Myanmar
  35. Najas tenuissima (A.Braun ex Magnus) Magnus - Finland, Russia, Hokkaido
  36. Najas testui Rendle - western + central Africa
  37. Najas welwitschii Rendle - tropical Africa, western India
  38. Najas wrightiana A.Braun - Mexico, Central America, Cuba, Bahamas, Venezuela; naturalized in Florida

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<i>Najas marina</i> Species of aquatic plant

Najas marina is a species of aquatic plant known by the common names spiny water nymph, spiny naiad and holly-leaved naiad. It is an extremely widespread species, reported across Europe, Asia, Africa, Australia, the Americas and many oceanic islands. It can be found in many types of freshwater and brackish aquatic habitat, including bodies of alkaline water.

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<i>Najas gracillima</i> Species of plant in the family Hydrocharitaceae

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Najas ancistrocarpa is a species of aquatic plant in the Hydrocharitaceae family. It grows in fresh water ponds and is a native to Japan (Honshu) and to parts of China.

Najas tenuissima is a species of flowering plant belonging to the family Hydrocharitaceae.

References

  1. ↑ Prof. Dr. Otto Wilhelm Thomé Flora von Deutschland, Österreich und der Schweiz 1885, Gera, Germany
  2. 1 2 Kew World Checklist of Selected Plant Families
  3. ↑ USDA, NRCS (n.d.). "Najas". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 16 July 2015.
  4. ↑ Tanaka, Norio; Setoguchi, Hiroaki; Murata, Jin (1997), "Phylogeny of the family hydrocharitaceae inferred fromrbcL andmatK gene sequence data", Journal of Plant Research, 110 (3): 329–337, doi:10.1007/BF02524931, S2CID   10939773
  5. ↑ Les, DH; Cleland, MA; Waycott, M (1997), "Phylogenetic studies in Alismatidae, II: Evolution of Marine Angiosperms (Seagrasses) and Hydrophily", Systematic Botany, 22 (3): 443, doi:10.2307/2419820, JSTOR   2419820
  6. ↑ Genera of Hydrocharitaceae, GRIN Taxonomy for Plants
  7. 1 2 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 Society141(4): 399-436. (Available online: Abstract | Full text (HTML) | Full text (PDF) [ dead link ])
  8. ↑ 197. Najadaceae A. L. de Jussieu, Flora of North America
  9. ↑ Ito, Y., Nr. Tanaka, S.W. Gale, O. Yano, J. Li (2017) "Phylogeny of Najas (Hydrocharitaceae) revisited: Implications for systematics and evolution". Taxon66(2): 309-323. doi: 10.12705/662.2
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