Aegopodium (Bishop's Weed)
A carpet of aegopodium thrives under a Kousa dogwood in late June.
There's a reason the common name for this groundcover has the word "weed" in it... It's one of the 'thugs' that garden writers warn you about. But it is pretty.
This patch is rapidly taking over a large garden I have on a west-facing slope, overrunning everything in the garden. It spreads by underground runners that run very deep so pulling it out is impossible. Even digging it out is difficult--any piece that's left in the ground starts the process all over again. Unfortunately, it was one of the first gifts I received from a fellow gardener when I started this hobby 30 years ago. Consequently, I have been trying to get rid of it for about 25 years!
I'm never completely successful, so I always have a patch of it cropping up somewhere in the yard. I don't give it away, I throw it away, because I don't want to inflict it on anyone else.
But if you want a lovely groundcover, and have the right spot where it can run rampant, this is it.