Species features
| Common names | Water chestnut, Water caltrop |
| Latin name | Trapa natansL. |
| Conservation status and threats | PROTECTED species in Bulgaria. |
| Description and identification | Herbaceous annual water plant. Height 2 m. Flowering June-July. |
| Distribution in Bulgaria | In the next phytogeographic regions: The Danubian Plain, North-Eastern Bulgaria, The Predbalkan, Stara Planina (east), Thracian Plane, The Rhodopes (east) and The Black Sea coast. Up to 500 m above see level. |
| General distribution | Native in Europe, Asia and Africa. |