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Scientific classification e
Kingdom: Plantae
Clade: Angiosperms
Order: Nymphaeales
Family: Nymphaeaceae
Genus: Barclaya

Hydrostemma Wall.

Barclaya is a genus of 3 - 4 species of flowering plants of the family Nymphaeaceae. Barclaya are aquatic plants native to tropical Asia. The genus was named in honour of the American-born English brewer and patron of science Robert Barclay.[1][2]


Hydrostemma is a name that takes precedence over the name Barclaya, on account of having been published 6 months earlier. However, the name Barclaya, being much better known than Hydrostemma, has been "conserved" and Hydrostemma is therefore a synonym of Barclaya.[3]


Barclaya is sometimes given its own family status as Barclayaceae on the basis of an extended perianth tube (combined sepals and petals) arising from the top of the ovary and by stamens that are joined basally, but morphological and genetic studies support the view that Barclaya should be retained in the family Nymphaeaceae.[4]


Plants grow from egg-shaped tubers that produce short runners and a basal rosette of leaves. All leaves are submerged.[1]



  1. ^ a b Slocum, Perry D. (2005). Waterlilies and Lotuses: Species, Cultivars and New Hybrids. Timber Press. ISBN 978-0-88192-684-2. Retrieved 2008-12-30. 
  2. ^ Wallich, Nathaniel (1827). "Description of a new genus of plants belonging to the order Nymphaeaceae". Transactions of the Linnean Society of London. 15: 442–448, Tab. 18. doi:10.1111/j.1095-8339.1826.tb00125.x. 
  3. ^ Crusio, W. E.; J. Bogner (1984). "Proposal to conserve 2515 Barclaya against Hydrostemma (Nymphaeaceae)". Taxon. 33 (3): 517–519. doi:10.2307/1221000. JSTOR 1221000. 
  4. ^ Schneider, E. L. (1978). "Studies of the Nymphaeaceae. IX. The Seed of Barclaya longifolia Wall". Botanical Gazette. 139 (2): 223–230. doi:10.1086/336993. JSTOR 2473739. 

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