A plant that grows in wet places and has yellow flowers. Also called marsh marigold.
Sumpweed is a plant that likes to be in wet places, like near a river or a lake.
Examples:
The sumpweed has pretty yellow flowers.
I saw a sumpweed near the pond.
The sumpweed is in the water.
The sumpweed is the happiest plant in the garden.
The sumpweed is so big, it can touch the sky!
The sumpweed near the river is very pretty.