Identifying a flower

[Serena]

Hi everyone...I'm here because I am going bananas over what type of flower I have growing in my front bed. I was told that these flowers came with my grandmother when she moved to the states from Polland. I was told they were buttercups. Where they look like buttercups, they aren't in the same family. The stems are very leafy, almost where you cannot see the stalk, and flowers bud not only at the top but will be downwards as well. The flowers I have, have 4 petals, and not the typical 5 of buttercups. They come back in the spring it seems (a little later this year in Michigan), and since removing a bush last year that was next to where I had transplanted them, they have spread. They are about 8-12 inches tall, very strong stems, and get full sun daily. By the second picture posted, you can see that the bottom of the plants, have red leaves.

If anyone knows what these are, and how to care for them, please let me know. TIA. :)

Editing to say that since the sun is going down, that the petals of the flowers that recently bloomed are closing up...is that significant? I have also come across pictures of Evening primrose and the flowering is almost identical.

First bloom


Group without any blooms
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[Newt]

Hi Serena,
Your flowers are called sundrops - Oenothera fruticosa. Sorry to say that they are native to the US. Not sure if they grow in Poland, but you could do a google search with something like:

Oenothera fruticosa + Poland
or just
Oenothera + Poland

They like well drained soil on the dry side in full sun.
http://www.botany.wisc.edu/garden/db...cies=fruticosa

By the way, you posted this in the Annuals catagory. These plants are perennial and will return every year and spread as they mature.
Newt