green leaves of duckweed water lens covering the entire surface of the pond.

duckweed water lens are flowering aquatic plants which float or just beneath surface still slowmoving bodies fresh and wetlandsthey very simplelacking an obvious stem leaves greater part each plant small organized thallus frond structure only few cells thick often air pockets aerenchyma that allow it under lemnaceae lemnoideae lemna wetlands floating green botany nature pantropical invader mats pond countryside rural