If you post a photo here, I bet we'll have the answer for you pretty fast!

Let's see if this works.

Here is a link that might be useful: Spring Flowers

Oenothera speciosa.....really pretty, but can be invasive!

goblugal - that's exactly what it is. I see one of my neighbors has it growing on their hillside and every year it looks the same. It doesn't look like it's spreading too much. I'm going to get some and use it as an edging. I called my local greenhouse and they have a few gallons. Thank you finding out the name for me.

Well I think I changed my mind on this flower. I've been reading up and it looks like it's too invasive for me. I guess I'll find something else to use as an edging. I'm just getting too tired of my hostas.

I have that in my garden and I just love it. It does spread but not in a bothersome way. It's such a "spindly" flower that it is easy to yank out if you don't want it. I adore the way I get drifts of delicate pink flowers every spring. I often plant other annuals among it and have no worries about digging some of it out to plant something else.

Mine is "Siskiyou" but I call it primrose.

I don't think it would be so good for edging, though, since it does travel. I really do love it and look forward to it every year.

Here is a link that might be useful: Siskiyou