European Yellow Loosestrife (Lysimachia vulgaris)

Hi Doerthe.
It's the Yellow, or Garden Loosestrife. (lysimachus vulgaris) a common plant, almost a weed, in Europe. I like it but it can take over one's garden very quickly unless it's roots can be restricted. In other words a pretty garden thug! But worth it - just! . I had it in a couple of spots as it was a useful mid border plant in boggy places where other plants weren't so successful!

Thank you, Andy, great information. I have photographed wildflowers in Michigan for 40 years and have never seen it. Yesterday I noticed it around a small pond in an otherwise natural setting. I wonder if someone from Europe brought seeds from a trip and planted them there.

Sometimes it is baffling how a variety suddenly springs up in an unexpected place. Yes, humans are often the (unintentional, or even intentional!) agents, but birds, and even extreme weather, can be implicit too!

This is a new plant to me. The flowers are pretty. Thanks to Andy for identifying it. We have purple loosestrife here in Mississippi, which is considered a weed.

We have both in the UK. The purple one I found mainly in marshy areas on clifftops in Cornwall and elsewhere - growing in the wild. The yellow variety I have more often seen in gardens.