Eriocaulon is a genus of about 400 species commonly known as pipeworts, of monocotyledonousflowering plants in the family Eriocaulaceae. 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 ca. 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; 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. 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. Some species can persist as buried seeds during unfavorable conditions. The scientific name is derived from Ancient Greek , erion, meaning 'wool', and , caulos, meaning 'stalk'.
Eriocaulon zollingerianumKoern. - China, India, Indonesia, Laos, Malaysia, New Guinea, Philippines, Thailand, Vietnam, NT, Qld, Australia
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
^ ab"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. Retrieved 2013.