It looks like curly dock. A weed. It get a long stalk that turns brown with seeds on it. Commonly found in rangeland and roadsides. Google curly dock.

I have the same problem Bloomingamaryllis... Something started growing in my lasagne bed that I didn't recognize as either weed or plant, so I thought I'd let it go. It's growing very fast though, so I'm of the opinion that it's too good to be true, so out it goes.

On the other hand... I've been waiting for my lone surviving (of 3) Salvia Greggi to bloom. But the plant that's next to that marker is blooming now with the tiniest of white daisy flowers. So I guess none of the Greggi survived. So what is this? A misshipment from the nursery? I'm pretty sure it's not German chamomile. I have what think is that growing elsewhere and it's different foliage. This is very, very fine foliage. The flowers themselves are about a 1/4" across. I'm wondering if it might be some type of aster, since it just started blooming now?

Alice

Stinking Chamomile? It's listed as a Colorado invasive & is a member of the Aster family.

Here is a link that might be useful: Description/photo of Stinking Chamomile

Thanks Mexicanhat. I think the photo you have linked to is the other chamomile that's popped up in several places. The stinking chamomile is much bushier than this other unknown plant.

Alice