Biology:Najas gracillima

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Short description: Species of plant in the family Hydrocharitaceae

Najas gracillima
Najas gracillima.JPG
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Hydrocharitaceae
Genus: Najas
Species:
N. gracillima
Binomial name
Najas gracillima
(A.Braun ex Engelm.) Magnus
SynonymsThe Plant List
  • Caulinia amurensis (Tzvelev) Tzvelev
  • Caulinia japonica (Nakai) Nakai
  • Caulinia tenuissima subsp. amurensis Tzvelev
  • Najas indica var. gracillima A.Braun ex Engelm.
  • Najas japonica Nakai
  • Najas tenuissima subsp. amurensis (Tzvelev) Vorosch.

Najas gracillima,[2][3][4][5] the slender waternymph,[6] is a submerged species of aquatic plant in the Hydrocharitaceae family.[7] found in lakes and streams. It is native to China (Fujian, Guangxi, Guizhou, Hainan, Hebei, Hubei, Jiangxi, Jilin, Liaoning, Nei Mongol, Taiwan, Yunnan, Zhejiang), Russian Far East (Amur and Khabarovsk), Japan , Korea, Taiwan, Iran, Alberta, Ontario, Newfoundland, Nova Scotia, New Brunswick, the eastern United States (every state east of the Mississippi River except Florida, plus Minnesota, Iowa, Missouri and the District of Columbia). It is also considered introduced and naturalized in France , Spain , Italy and California (Plumas and Tehama Counties).[8][9][10][11]

Najas gracillima is a small aquatic annual with branching stems. The unisexual flowers ( each flower is only one sex) are produced in the axils of the branchlets and bases of the leaf sheaths.[12] It is listed as endangered in Minnesota.[12] It lives in soft-water lakes and ponds with mud and silt bottoms, and appears to be sensitive to water turbidity, warming, and eutrophication.[12]



References

  1. ↑ Maiz-Tome, L. (2016). "Najas gracillima". IUCN Red List of Threatened Species 2016: e.T168711A1213531. doi:10.2305/IUCN.UK.2016-1.RLTS.T168711A1213531.en. https://www.iucnredlist.org/species/168711/1213531. Retrieved 20 November 2021. 
  2. ↑ Magnus, Paul Wilhelm. 1870. Beitrage zur Kenntniss der Gattung Najas 23, Najas gracillima
  3. ↑ Engelmann, Georg. 1867. Manual of Botany of the Northern United States (ed. 5) 681, Najas indica var. gracillima
  4. ↑ Tzvelev, Nikolai Nikolaievich. 1979. Novosti Sistematiki Vysshikh Rastenii. Moscow & Leningrad 16: 208, Caulinia amurensis
  5. ↑ Nakai, Takenoshin. 1937. Journal of Japanese Botany 8:853, Najas japonica
  6. ↑ "Najas gracillima". Natural Resources Conservation Service PLANTS Database. USDA. https://plants.usda.gov/core/profile?symbol=NAGR. Retrieved 16 July 2015. 
  7. ↑ "Najas gracillima (A.Braun ex Engelm.) Magnus". The Trustees of the Royal Botanic Gardens, Kew. n.d.. https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:603011-1. 
  8. ↑ "World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew" (in en-GB). http://apps.kew.org/wcsp/namedetail.do?name_id=308248. 
  9. ↑ Biota of North America Project, Najas gracillima Image
  10. ↑ "Najas gracillima in Flora of China @ efloras.org". http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=222000256. 
  11. ↑ "Najas gracillima in Flora of North America @ efloras.org". http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=222000256. 
  12. ↑ 12.0 12.1 12.2 Barbara Coffin; Lee Pfannmuller (1988). Minnesota's Endangered Flora and Fauna. U of Minnesota Press. p. 116. ISBN 978-0-8166-1689-3. https://books.google.com/books?id=wfWNq91AjeoC. 

External links

Wikidata ☰ Q11086595 entry




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