Tamarisk

The tamarisk plant, also called saltcedar, is infesting waterways across the West. The scaly-leafed shrub can grow taller than a person. It sucks up a lot of water and spits out salt, making the soil around it too salty for other plants to grow.

“It’s very bad, yes,” says Alex Gaffke, a graduate student in land resources and environmental science at Montana State University.