Ottelia alismoides

About

Ottelia alismoides, commonly known as duck lettuce, is a species of aquatic plant native to Asia and northern Australia. Due to habitat loss and deterioration, it is endangered in China and Japan, although it is an invasive weed in America. Its genome has also been sequenced, resulting in a 6.45 Gb assembly to help study its unusual carbon metabolism mechanisms and aid in genetic conservation.

Summary from Wikipedia