Bogbean Plant
The Bogbean Plant can be found in Dustwallow Marsh.[50, 23] This plants appears while escorting "Stinky" Ignatz during the quest 
[15-30] Stinky's Escape.
It's unsure what exactly the leaves from this plant are good for. Mebok Mizzyrix plans to use them for a potion, while Morgan Stern plans to cook with them.