Bishop's Weed Aegopodium podagraria Plant only in the toughest, darkest of places where you want to add some "light" to the darkness. I do find it spreads over the years, and I would never plant a ground cover like this in a specimen bed anyway. Only reason I keep it, is that it is an heirloom from great-grandma's (1876-1970) garden.
Common Milkweed Asclepias syriaca This is a wildflower (weed) growing out in a field behind the house. It is very fragrant when in full bloom, and the butterflies love it. Will collect seeds for you this fall, if needed. INVASIVE.