Some neighbors asked about Phlox and Phlox-like plants.
Native Wild Blue Phlox blooms April-June. Garden Phlox blooms July – September.
The key identifier: NATIVE PHLOX HAS 5 PETALS, the invasive phlox has 4 petals. There is a phlox-like purple flower blooming in the ravine, which may be Dame’s Rocket. Here’s a link to tell them apart.