Rain-drenched and a little bit past its peak. From what I gather, Silene regia is rare in Michigan, but all signs I read (including help from others) led me to this ID.
The Caryophyllaceae, commonly called the pink family or carnation family, are a family of flowering plants. It is included in the dicotyledon order Caryophyllales in the APG III system, alongside 33 other families, including Amaranthaceae, Cactaceae, and Polygonaceae. It is a large family, with 86 genera and some 2,200 species.