Home » Plants » Amaranthus tuberculatus

Roughfruit Amaranth (Amaranthus tuberculatus (Moq.) Sauer)

Page contents

Range - Expand

Native or Not Present
Introduced or Not Present
Native or Expanded
Expanded or Not Present
Native or Expanded or Not Present

This tentative map is based on our own research. It may have limited data on Canada and/or Mexico, and there is some subjectivity in our assignment of plants as introduced vs. expanded. Read more in this blog post.

This species is a weedy annual, and a major weed in agriculture. It is spreading in spite of human attempts to control it, but humans are also helping it through creation of agricultural and other disturbed habitats it favors, and also through transporting its seeds unintentionally. We mark some western populations as introduced because of relative isolation from its native range, whereas eastern populations have mostly expanded contiguously with this range.