Question

Name an exotic water weed.

Answer 1

Exotic waterweed

1. They are non-native species that may live and breed in an area, displacing local species and modifying ecological systems.
2. They invade and grow too densely in an area to the point where it obstructs the area's usefulness.

Pontederia crassipes is a South American aquatic plant that has been naturalized all over the world and is often invasive outside of its native region.