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Fimbristylis dichotoma

Fimbristylis dichotoma
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Fimbristylis
Species:
F. dichotoma
Binomial name
Fimbristylis dichotoma
Subspecies and varieties[1]

see text

Synonyms[1]
  • Eleocharis dichotoma (L.) H.Karst.
  • Isolepis dichotoma (L.) Kunth
  • Scirpus dichotomus L. (1753) (basionym)

Fimbristylis dichotoma, commonly known as forked fimbry[2] or eight day grass,[3] is a sedge of the family Cyperaceae that is native to tropical areas.

Description

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The annual or perennial plant, 10–80 cm tall, with numerous long stems about 2 mm in diameter, slightly three-angled, compressed below the inflorescence, node-less, smooth and has a tufted habit. The root system is fibrous, wiry, black. Short rhizomes. Leaves numerous, forming a dense tuft at the base of the stem, being at least half as long as the stem.[4]

Distribution

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Fimbristylis dichotoma is widely distributed in Asia, Africa and Australia[3] as well as in other parts of the tropics.[5]

Habitat

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Fimbristylis dichotoma grows well on wet or even flooded soil; it is also found in uplands where the soil has good water retention. It is also found in swamps, open waste places, grassy roadsides, Imperata cylindrica grasslands and some plantation crops.[5]

Subdivisions

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Six subdivisions are accepted.[1]

  • Fimbristylis dichotoma subsp. depauperata (R.Br.) J.Kern (synonyms Fimbristylis depauperata R.Br. and F. spirostachya F.Muell. ex Benth.) – Andaman Islands, southeastern China, eastern Malesia, New Guinea, Bismarck Archipelago, Northern Territory, Queensland, and Western Australia
  • Fimbristylis dichotoma subsp. dichotoma – tropical and subtropical Americas and Asia, sub-Saharan Africa, Arabian Peninsula, New Guinea, and Australia
  • Fimbristylis dichotoma var. floribunda (Miq.) T.Koyama – central and southern Japan and southern Korea
  • Fimbristylis dichotoma subsp. glauca (Vahl) T.Koyama – southern India and Sri Lanka
  • Fimbristylis dichotoma subsp. ophiticola (Britton) Zavaro – Cuba
  • Fimbristylis dichotoma subsp. podocarpa (Nees) T.Koyama – west and central Africa, Madagascar, Indian subcontinent, Indochina, southern China, Korea, Malesia, New Guinea, Northern Territory, and Queensland

References

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  1. ^ a b c "Fimbristylis dichotoma (L.) Vahl". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 16 July 2025.
  2. ^ NRCS. "Fimbristylis dichotoma". PLANTS Database. United States Department of Agriculture (USDA). Retrieved 28 March 2016.
  3. ^ a b "Fimbristylis dichotoma". FloraBase. Western Australian Government Department of Biodiversity, Conservation and Attractions.
  4. ^ "tall fringe rush (Fimbristylis dichotoma)".
  5. ^ a b "Fimbristylis dichotoma (tall fringe rush)". CABI Compendium. CABI Compendium: 20680. 2021. doi:10.1079/cabicompendium.20680.
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