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Lyall's Rockcress (Boechera lyallii (S.Watson) Dorn)

Also classified as Arabis lyallii.

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Range - Expand

Native 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.


The ERA data showed this plant also native to some regions in the southeastern U.S., but none of the sources we checked, including the USDA that the ERA supposed used as their source, cite this population so we assume it must be an error.

Arabis lyallii (Lyall's rockcress) | USDA PLANTS Database (About This Site)

Boechera lyallii | Biota of North America Project (BONAP) (About This Site)

Boechera lyallii | NatureServe Explorer (About This Site)

Boechera lyallii | Flora of North America (About This Site)