I remember exploring some woodlands that had recently become a public park near my house several years back and was excited by some mystery bulb. I thought it was a new (to me) native wildflower but it turned out to be Ornithogalum umbellatum. Which I've since learned can be a pest. At any rate, where these woods now stood must have once had a home. And these were the garden remnants. Also growing nearby was a stand of Equisetum... and a few scattered Arisaema triphyllum. I've also found Camassia scilloides, Delphinium tricorne, and lots of other native woodland gems throughout that park. My favorite discovery was a native Sisyrinchium species. Of all these plants I think the Ornithogalum was the only true garden remnant of the old homestead... and maybe the scouring rush.