trapa natans การใช้

A water plant with similarly-shaped spiked seeds is called the " water caltrop ", " Trapa natans ".
This helps support rare plants such as the common water chestnut ( " Trapa natans " ) grow near the lake.
Technically, they are corms, or fleshy underground stems, of the water chestnut plant ( Trapa natans ), which grows along the muddy edges of ponds and lakes, or in flooded fields.
Besides this, there are also three species which are strictly protected according to the Bern Convention : European waterclover ( " Marsilea quadrifolia " ), floating watermoss ( " Salvinia natans " ), water caltrop ( " Trapa natans " ).
Davenport confessed in an entry in the Bulletin of the Torrey Botanical Club, Vol . 6, page 352 : " I have several times had plants of " Trapa natans " that were collected in the vicinity of Boston, during the present year, brought to me for identification, and I have entertained no doubt as to the manner of its introduction into waters outside Cambridge Botanic Garden.