Guess that Invasive Plant (1/5)Online version GAME 1/5: Guess the native Charles River Plant using the clues to the side of the image! Then, advance to the next game using the arrows at the top of the page! by Charles River Conservancy 1 Has tall bamboo-like stems and sprays of white flowers Hints 1 Forms dense thickets in low-lying areas 2 Out-competes nearby plants so the soil underneath it is often bare and susceptible to soil erosion