Marsilea ancyclopoda

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Tropical water clover
Scientific classification e
Kingdom: Plantae
Division: Pteridophyta
Class: Polypodiopsida/Pteridopsida
Order: Salviniales
Family: Marsileaceae
Genus: Marsilea
Species: M. ancyclopoda
Binomial name
Marsilea ancyclopoda

Marsilea ancyclopoda, common name tropical water clover, is a plant species native to the warmer parts of the Western Hemisphere. It is widely distributed through Latin America from Mexico to Argentina, as well as from the West Indies. In the United States, it has been reported only from Florida, southern New Mexico,[1] Puerto Rico and the Virgin Islands.[2][3][4][5]

Marsilea ancyclopoda is a floating aquatic herb forming dense colonies on the surface of the water. Petioles are up to 18 cm long, densely pubescent. Pinnae (leaflets) are 4, palmately arranged like Trifolium, up to 17 mm across and about the same distance long. Sporocarps are nodding, below the level of the stems (this being the only species in the genus with this character), covered with a pelt of shaggy hairs.[2][6][7]


  1. ^ SEInet Detailed Collection Record Information, Marsilea ancyclopoda, Hidalgo County, New Mexico
  2. ^ a b Flora of North America vol 2
  3. ^ Encyclopedia of Life,
  4. ^ Southwestern Environmental Information Network
  5. ^ Johnson, D. M. 1986. Systematics of the New World species of Marsilea (Marsileaceae). Systematic Botany Monographs 11: 1--87.
  6. ^ A. Braun, Monatsber. Königl. Preuss. Akad. Wiss. Berlin. 1863: 434
  7. ^ Johnson, D. M. 1985. New records for longevity of Marsilea sporocarps. American Fern Journal 75: 30--31.