Carex helferi is a tussock-forming species of perennial sedge in the family Cyperaceae. It is native to parts of South East Asia.[1]

Carex helferi
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Clade: Commelinids
Order: Poales
Family: Cyperaceae
Genus: Carex
Species:
C. helferi
Binomial name
Carex helferi

Description

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The sedge has a woody rhizome with central culms that have a triangular cross-section with a length of 20 to 50 cm (7.9 to 19.7 in) and a width of 1 to 3 mm (0.039 to 0.118 in) and that are smooth lower down with a rough texture toward the top. It has basal flattish to folded lengthwise leaves with a broadly linear to lanceolate shaped blade that is 17 to 60 cm (6.7 to 23.6 in) long with a 1 to 7 cm (0.39 to 2.76 in) long dark brown sheaths that usually disintegrate. The narrow inflorescences appear as a narrow branched cluster with a length of 17 to 20 cm (6.7 to 7.9 in) with three to six crowded to distant nodes.[2]

Taxonomy

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The species was first formally described by the botanist Johann Otto Boeckeler in 1876 as a part of the work Linnaea.[3] It has two synonyms;

  • Carex helferi subsp. mapaniifolia (Ridl.) T.Koyama
  • Carex mapaniifolia Ridl. [2]

Distribution

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It is often situated along river banks in the understorey of evergreen forests from an altitude of 0 to 400 m (0 to 1,312 ft)[2] in tropical biomes, the range of the plant extends from Myanmar in the north to Thailand in the south and on the island of Java in Indonesia.[1]

See also

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References

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  1. ^ a b "Carex helferi Boeckeler". Kew Science – Plants of the World Online. Retrieved 19 November 2022.
  2. ^ a b c "Carex helferi Boeckeler". World Flora Online. Retrieved 19 November 2022.
  3. ^ "Carex helferi Boeckeler". Tropicos. Missouri Botanical Garden. Retrieved 19 November 2022.