Does anyone recognize this plant?

[Skidmore]

I found a single one of these when I was pulling weeds last year and took a picture of it. I collected seeds from it's pod and grew one in a pot, but they get weedy fast. I thought it resembles something from the wild artichoke family. Haven't seen it again, but I have some seeds that I'll plant so long as I know it's not a problem plant. I live in Iowa--for zone questions.

[spinbaby]

1. Evening Lychnis

I see it a lot in areas like construction zones and dry roadsides, so I'm guessing it's one of those plants that colonizes waste areas.

[Skidmore]

2. Thanks. It's a beatiful plant.

I might plant some down on the far end of the yard where not much grows but weeds from the back field.

[spinbaby]

3. It will probably be happy there

I've admired it, too.

[Ecumenist]

4. Please don't take this wrong because I don't mean it to be

rude or disruptive but I don't think that that is what this plant is. The leaves are wrong and the flower structure is COMPLETELY DIFFERENT. Evening Lychnis has flowers that sit on the top of a swollen calyx where this plant has a much more open habit, VERY similar to the flowers of Okra or a cotton plant. The petals on an Evening Lychnis are also somewhat perforated in a symmetrical fashion. This has leaves that look like those of a Pelargonium plant, finely cut and are spaced on opposing sides of the stem. Evening Campion or Evening lychnis has blade-like leaves and tends to send up a stalk with flowers on the end of the stem from a base that has a "rosette" of blade like leaves. I'm not sure what this plant is--I first thought it looked alot like prickly poppy but the flower is wrong and the lack of prickles on the stem.

I know that sometimes, there are local names for flowers, so I wonder if this could be the case. Again, I submit this humbly and in the best way.:hi:

[cwydro]

5. I was at a workshop last week

by the Nature Conservancy and that looks a LOT like a plant that they said was a food plant for a certain kind of blue butterfly. Of course, I have forgotten the name of the plant AND the butterfly.