Posted: 19/05/2015 at 09:28
Lamium Mrs G. I like the one at the back.
Reminded by Will's G. phaeum, Geranium macrorrhizum is a good one as well and if you're willing to risk it, green alkanet, Pentaglossis sempervirens, a bit invasive though.
Too early to see what happens but I have a mass self-seeding of Eryngium giganteum under a group of pines. They look very healthy as foliage plants and can stand the dry