Eriocaulon

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Eriocaulon is a genus of nearly 500 species of monocotyledonous flowering plants in the family Eriocaulaceae, commonly known as pipeworts. Species of Eriocaulon have a wide distribution in the Americas, the British Isles, sub-Saharan Africa, central, east, south, and southeast Asia, Papuasia, Australia, and the Pacific.[2]

Etymology

The scientific name is derived from Ancient Greek ἔριον, Script error: No such module "lang"., meaning 'wool', and καυλός, Script error: No such module "lang"., meaning 'stalk'.[3]

Description

The species are mostly herbaceous perennial plants, though some are annual plants; they resemble plants in the related families Cyperaceae (sedges) and Juncaceae (rushes), and like them, have rather small, wind-pollinated flowers.

Distribution and habitat

The genus is widely distributed, with the centers of diversity for the group occurring in tropical regions, particularly southern Asia and the Americas. A few species extend to temperate regions, with approximately 10 species in the United States, mostly in the southern states from California to Florida, and only two species in Canada; China has 35 species, also mostly southern. Only one species (E. aquaticum) occurs in Europe, where it is confined to the Atlantic Ocean coasts of Scotland and Ireland;[4] this species also occurs in eastern North America and is thought to be a relatively recent natural colonist in Europe. In the Americas, Eriocaulon is the only genus in its family that occurs north of Florida.[5]

They tend to be associated with wet soils, many growing in shallow water, in wetlands, or in wet savannas like flatwoods. In wet soils, their abundance appears to be related to water levels, fire frequency, and competition from other plants such as grasses. Experiments have shown that they are weak competitors compared to many other wetland plant species.[6] Some species can persist as buried seeds during unfavorable conditions.[7]

Selected species

Script error: No such module "Labelled list hatnote". As of May 2026, 496 species are accepted.[2] The names below were sourced from official sources including: the Flora of North America,[8] the Flora of China,[9] currently accepted Australian taxa from the Australian Plant Name Index,[1] etc..

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File:Eriocaulon decangulare.jpg
Eriocaulon decangulare
File:Eriocaulon heterolepis in Narshapur, AP W IMG 0947.jpg
Eriocaulon heterolepis
File:Eriocaulon madayiparense Type specimen.jpg
Eriocaulon madayiparense type specimen
File:Eriocaulon scariosum 1.jpg
Eriocaulon scariosum
Species accepted by the authoritative Australian Plant Census, informally named, described and published awaiting formal publication
  • Eriocaulon sp. C Kimberley Flora (G.J.Keighery 4610) WA Herbarium – WA, Australia
  • Eriocaulon sp. E Kimberley Flora (A.S.George 12635) WA Herbarium – WA, Australia
  • Eriocaulon sp. G Kimberley Flora (K.F.Kenneally 11374E) WA Herbarium – WA, Australia
  • Eriocaulon sp. Harding Range (M.D.Barrett & R.L.Barrett MDB 1826) WA Herbarium – WA, Australia
  • Eriocaulon sp. Theda (M.D.Barrett MDB 2063) WA Herbarium – WA, Australia

References

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  1. ^ a b Page Module:Citation/CS1/styles.css has no content."Eriocaulon%". Australian Plant Name Index (APNI), Integrated Botanical Information System (IBIS) database (listing by % wildcard matching of all taxa relevant to Australia). Centre for Plant Biodiversity Research, Australian Government. Archived from the original on 26 March 2022. Retrieved 20 June 2013.
  2. ^ a b c Page Module:Citation/CS1/styles.css has no content."Eriocaulon L." Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 30 May 2026.
  3. ^ Page Module:Citation/CS1/styles.css has no content.Kaul, Robert (2006), "Eriocaulon", Flora of North America, vol. 22, New York & Oxford: Oxford University Press
  4. ^ Sculthorpe, C. D. The Biology of Aquatic Vascular Plants. Edward Arnold. London. 1967. Reprinted 1985. Figure 11.6.
  5. ^ Page Module:Citation/CS1/styles.css has no content.Kaul, Robert (1966), "Eriocaulaceae of continental North America north of Mexico", Sida, 2: 285–332
  6. ^ Wilson, S. D. and P. A. Keddy. 1986. Species competitive ability and position along a natural stress/disturbance gradient. Ecology 67:1236-1242.
  7. ^ Keddy, P. A. and A. A. Reznicek. 1982. The role of seed banks in the persistence of Ontario's coastal plain flora. American Journal of Botany 69:13-22.
  8. ^ Page Module:Citation/CS1/styles.css has no content."Eriocaulon". Flora of North America. Retrieved 20 June 2013.
  9. ^ Page Module:Citation/CS1/styles.css has no content."Eriocaulon". Flora of China. Retrieved 20 June 2013.
  10. ^ Eriocaulon madayiparense.
  11. ^ Page Module:Citation/CS1/styles.css has no content.P Balan, Anoop; Aloor Jose, Robi (2021-03-09). "Eriocaulon Meenachilense, A New Tuberous Species of Eriocaulaceae from the Southern Western Ghats, India". Edinburgh Journal of Botany. 78: 1–8. doi:10.24823/EJB.2021.336. ISSN 1474-0036.

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