Often mistaken by Pittsburghers for a phlox (or “some kind of phlock,” as old Pa Pitt has heard Pittsburghers say), this is actually a member of the mustard family. Its four-petaled flowers give it away. It came to our country as a garden favorite and decided it liked our climate, and now it lights up roadsides and the edges of woods everywhere. These plants were blooming in Bird Park and along Beadling Road in Mount Lebanon.

For a description of the species, see the Hesperis matronalis reference page.