Invasive Plants


Red sesbania (Sesbania punicea) is expanding in the region’s riparian zones, with large floating seeds that readily start new infestations downstream. (Photo: Jim Dempsey, California State Parks)

The Sacramento River watershed, like other regions of California, is adversely affected by invasive plants. Agriculture, recreation, water resources, and wildlife habitat are all impacted. Yellow starthistle, Arundo, perennial pepperweed, knapweeds—the list of problem plants is long. In the sections below you will find information on: the plants themselves; how to control them; the organizations working on them; and other resources of use to those in the field.