Oxalis?

[mouse]

I've read that most varieties are garden invasive and prone to crowding out smaller plants, but that supposedly the Oregon native oxalis is mild mannered. So I got some because its so pretty and seems perfect for my woodland/shade beds. I put it in with my hosta, columbine and hellebore.

Then I see this at the park. Is it crowding out the hosta there in the middle? Have I made a terrible mistake?

[dirtyred]

Yeah, just yank it out when it starts to run.  I do this with my ajuga--when it tries to escape the bed, it's time for it to go.

[treedimensional]

Plant bigger hostas.