The link I sent above indicates there are rose and white variants so a variety of hues may be possible. Conditions may also affect color. Here's a picture I took at a local nature center of some wild vervain. FataMorgana

Compare with Verbena bonariensis or V brasiliensis. There's not enough detail in the picture to tell. Neither native in N America. The big leaf behind is Ricinus communis. We can't see the leaves of the Verbena except two small ones at the top of the plant.

Best thing I did this year was blazing star, echinacea purpurea, rattlesnake master, just kept going all summer in full sun (well, liatris was around 3 weeks). Eryngium yuccifolium was a superstar in my border this year. Maybe not "orthodox" prairie gardening but I put that combo w/ white blzing star and purple coneflower on one end of my border and purple liatris and white swan purple coneflower on the other end. When it actually worked the way I intended it to I was very suprised and happy. Most of my best combinations are happy accidents.

I am already battling virginia creeper, english ivy and northern sea oats! and probably will be fighting trumpet vine soon, and asiatic dayflower, and chameleon plant--all of which I innocently accepted and planted (except the virginia creeper, it just appeared; the ivy was already here). So I'll pass on the chicory--thanks for the warning. My yard is very wet in late winter & spring--my garden area has been built up a bit because of that--but can be quite dry as summer goes on. Does that sound like the conditions Joe-pye weed will like? It looks like a lovely tall plant for the back of the garden. Cydonia33--I looked up the blue mist flower, and I have that! --it was also a volunteer. Another "volunteer" that I have a lot of is a garlicky smelling allium-like plant. I wonder if the seeds of these natives were hiding beneath the top layer and were brought up to germinate when I turned the soil of the "lawn" to make the garden. I dug down 8-14 inches and added materiel to loosen the clay. I ran into a fair amount of trash (broken pottery and glass, a bottle, and such) that deep so I am kind of surprised to get so many flowers. One other thing that came up was a very tall, thick stemmed plant--I let it grow because I thought it might be a sunflower, but when it developed flowers they were more like small ugly dandelions, so I chopped it down and uprooted it. I still don't know what it was--it grew six feet tall!