I don’t know anything about plants, but I was so impressed with this one I spent a lot of time online trying to figure out what it was. Turns out it’s probably Queen Anne’s Lace, before the flower head opens. Unless it’s poison hemlock, which is apparently very similar to Queen Anne’s Lace (poison hemlock is extremely toxic, not just when ingested but also to the skin and respiratory system). Or it could be one of two other similar poisonous plants.
Either way, it’s absolutely beautiful before the flower opens.
Smith Cemetery is a tiny rural cemetery in central Ohio. It is a state nature preserve that is one of the last remnants of tallgrass prairie.