water lettuce - aquatic and wetland plants

aerenchyma aqua aquatic aqueous araceae arum autonomous autotrophic basket being biology biota blue botanic botanical botany cabbage dampish dampy emergent environment eukaryote feathery float floating flooding flora flow fluid free freshwater green greenery hydric hydrological hydrophyte hydrophytic kind leaved lettuce like liquid lymph macrophyte margin mat metaphyta moist monocotyledon nature nile organism parallel perennial photosynthetic plantae plantes rosette shellflower specimen stratiotes stream structure submerged surface vegetabilia vegetal vein verdure watery wavy wetland