There's hydrilla, water hyacinth, alligatorweed, water lettuce, grass carp and more.
From the chron.com
Water lilies, water lettuce, irises and hibiscus grow prolifically in and around the pond.
From the charlotteobserver.com
Manatees also live in the back waters, gazing on water lettuce.
From the theatlantic.com
Water lettuce regularly to prevent the leaves becoming bitter.
From the smh.com.au
Everything I've read recently on the problem in Lake Victoria refers only to water hyacinth, ignoring water lettuce.
From the newscientist.com
You'll rinse your mouth with water, just in case lettuce got stuck in your teeth.
From the denverpost.com
Both the picture on the contents page and the one in the main article featuring hippos and lily-trotters are of water lettuce,Pistia stratiotes.
From the newscientist.com
Verdant forest lawns ahead turned out to be floating mats of water lettuce, each bearing a microcosmic menagerie of frogs and spiders that scrambled from our path.
From the independent.co.uk
Just steer clear of veggies with a high water content such as cucumber and lettuce.