green_go - if a plant isn't native, you always run the risk of introducing something which may become invasive in your garden conditions. Once you factor in moisture, soil components and natural predators, it's always wisest to think twice before planting something unless experience has shown that it behaves in your garden. Certain native species can also run rampant when planted in areas where they aren't traditionally native. Have I erred when planting certain perennials after hints on this forum suggested they were invasive? Let me count the number of self-sown seedlings I've regretted. I've no experience with Filipendula since I've never been tempted to plant it. I just make certain I've done my homework before digging a planting hole or setting something in it. Not planting something has been my guide and = less regrets.

Those are beautiful pictures, Randy! When I saw your pictures, the plant reminded me of a native plant that grows on my property in the bottom of the hollow where it's wet. Most of the plants have bloomed out, but I found one still in bloom - I had forgotten the name of the plant, so I looked it up, and it's pluchea foetida/stinking camphorweed. I've never seen any butterflies use the flowers, but then I don't go to the bottom of the hollow that often. The picture of pluchea purpurescens/salt marsh fleabane in my wildflower book looks just like your pretty pink flowers - I'm sure that's what yours is. Sherry

Yup - the flowering one is yarrow. Looks like a native one to me.

It's tansy or golden buttons, Tanacetum vulgare.