Brazilian waterweed
![Photo shows a very large, dense clump of weeds that grow in water picked up with a hook, plus a close-up photo of the plant.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/thumbnails/image/Delta8DrexlerPstr.jpg?itok=LSIlMcHD)
Detailed Description
Brazilian waterweed, with dozens of branches on every plant, forced the scientists to devise new techniques for measuring its impact on water flow.
Sources/Usage
Public Domain.
Brazilian waterweed, with dozens of branches on every plant, forced the scientists to devise new techniques for measuring its impact on water flow.
Public Domain.