Najas gracillima explained

Najas gracillima,[1] [2] [3] [4] the slender waternymph, is a submerged species of aquatic plant in the Hydrocharitaceae family.[5] 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).[6] [7] [8] [9]

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.[10] It is listed as endangered in Minnesota.[10] It lives in soft-water lakes and ponds with mud and silt bottoms, and appears to be sensitive to water turbidity, warming, and eutrophication.[10]

External links

Notes and References

  1. Magnus, Paul Wilhelm. 1870. Beitrage zur Kenntniss der Gattung Najas 23, Najas gracillima
  2. Engelmann, Georg. 1867. Manual of Botany of the Northern United States (ed. 5) 681, Najas indica var. gracillima
  3. Tzvelev, Nikolai Nikolaievich. 1979. Novosti Sistematiki Vysshikh Rastenii. Moscow & Leningrad 16: 208, Caulinia amurensis
  4. Nakai, Takenoshin. 1937. Journal of Japanese Botany 8:853, Najas japonica
  5. Web site: Najas gracillima (A.Braun ex Engelm.) Magnus. . n.d.. Plants of the World Online. The Trustees of the Royal Botanic Gardens, Kew. September 26, 2020.
  6. Web site: World Checklist of Selected Plant Families: Royal Botanic Gardens, Kew. apps.kew.org. en-GB. 2017-01-31.
  7. http://bonap.net/MapGallery/County/Najas%20gracillima.png Biota of North America Project, Najas gracillima
  8. Web site: Najas gracillima in Flora of China @ efloras.org. www.efloras.org. 2017-01-31.
  9. Web site: Najas gracillima in Flora of North America @ efloras.org. www.efloras.org. 2017-01-31.
  10. Book: Barbara Coffin. Lee Pfannmuller. Minnesota's Endangered Flora and Fauna. 1988. U of Minnesota Press. 978-0-8166-1689-3. 116.

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