Water caltrop

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Water caltrop is a common name for three different plant species in the family Trapaceae that grow in water. These species include Trapa natans, Trapa bicornis, and Trapa rossica. The name "water caltrop" comes from the distinctive horned shape of the fruit, which resembles the caltrop, a four-pointed metal device historically used in warfare to impede vehicles and foot soldiers.

Description[edit | edit source]

Water caltrop plants are aquatic, rooted in the sediment of bodies of water. They have floating leaves arranged in a rosette, and submerged leaves that are feather-like. The flowers are white and small, with four petals. The fruit is a nut with two to four horns.

Distribution and Habitat[edit | edit source]

Water caltrop species are native to warm temperate parts of Eurasia and Africa. Trapa natans and Trapa bicornis have been introduced to the United States and are considered invasive species in some areas. They grow in slow-moving or stagnant water bodies, including ponds, lakes, and slow streams.

Uses[edit | edit source]

The nuts of water caltrop are edible and have been used as a food source in Asia and Europe for thousands of years. They can be eaten raw or cooked and are often used in Asian cuisine. In addition to their use as food, water caltrop plants have also been used in traditional medicine in various cultures.

Invasive Species[edit | edit source]

In some regions, such as parts of the United States, water caltrop is considered an invasive species. It can form dense mats that cover the surface of water bodies, blocking sunlight and reducing oxygen levels in the water. This can have negative impacts on other aquatic plants and animals.

See Also[edit | edit source]

Template:Plants-stub Template:Invasive-species-stub

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