Najas gracillima

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Najas gracillima
File:Najas gracillima.JPG
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Hydrocharitaceae
Genus: Najas
Species:
N. gracillima
Binomial name
Najas gracillima
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

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  1. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  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. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  7. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  8. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  9. ^ Biota of North America Project, Najas gracillima Image
  10. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  11. ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
  12. ^ a b c Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
[edit | edit source]

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