Beware the thugs!
Both Dicentra formosa and Oxalis oregana are rampant growers that most people will later regret planting. You have been warned!
As for the pink Trillium ovatum, that's the ordinary color change that takes place once a flower if pollinated.
Did you, by any chance, see Achlys triphylla, the "vanilla leaf"? It's an epimedium-vancouveria sort of plant and very handsome. The leaves develop a vanilla scent on drying due to the formation of coumarin (iirc). Not usable in cooking.