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Cup Plant (Silphium perfoliatum L.)

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Range - Expand

Native or Not Present
Native or Expanded
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 widely cultivated for many purposes, as an ornamental, for biomass for energy production, as fodder, and in the US in native plant plantings. It frequently spreads from plantings, leading it to establish populations northeast of its native range. Because these new populations are contiguous with the native range, we mark them expanded.