Selected Plants of Navajo Rangelands
Os si tsóh
(a.k.a. Tall whitetop, giant whiteweed, perennial pepperweed, broadleaved pepperweed, clasping pepperweed, Lepidium virginicum)
Pepperweed is a highly invasive non-native herbaceous perennial. It can invade a wide range of habitats including riparian areas, wetlands, marshes, and floodplains. It adapts readily to natural and disturbed wetlands. As it establishes and expands, the plants create large stands that displace native plants and animals.
In addition to impacting alfalfa and pasture production, it has been reported to adversely affect food quality and nesting habitat for native birds.
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