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Western Tansymustard (Descurainia pinnata (Walter) Britton)

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Range - Expand

Native or Not Present
Native or Expanded

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 is a weedy plant that thrives on barren sites with poor soil. Humans have created more habitat for it in the northeast through land clearing and soil degradation, and as a result it has expanded its range slightly in this region, but it remains uncommon to rare, probably due to its preference for calcareous soils which tend to support lush vegetation in the humid northeast.