The roots would probably appreciate a light cover of soil, compost, or organic mulch add on top. Daylilies don't naturally grow exposed to air like this and while they may well survive, they won't be at their best.

Well whatever they are, they are obscure even if they are in a former herb or formal perennial flower garden. They still all look like naturalized roadside weed flowers to me, many of which are edible and medicinal if you are into that sort of thing. Using your pictures and good descriptions, here are some wild guesses you can wander down. I'll give you the tiny Knotweed, a Polygonum sp. though I am seeing hints the genus may have been changed to Persicaria. The top large leaf described as Cup Plant like is in the Asteraceae. Look in Rudbeckia, Helianthus and of course Silphium. The seed pods of the pink and white flower ginger smelling one remind me of some hibiscus - Sida specifically, Hollyhock and mallows. The leaves are all wrong though. My wild guess for the vase shaped wiry red stems is a Hawkweed, Hieracium sp., probably wrong, but definitely in the Asteraceae.

Thank you! Gorgeous plant. Thinking of adding a few on the north side of our house.

There is a horse chestnut tree on my property, Aesculus hippocastanum. It produces masses of seeds (buckeyes or conkers) that squirrels find irresistible and thoughtfully plant all over my and neighboring yards. They germinate and grow rapidly so every spring there is another crop to cull. This gets to be a BIG tree - 4 to 5 times that of A. pavia - so leaving yours in place may not be a very good idea. The point is the mother tree may not necessarily be that close to your property and so you really have no idea how big it could get until fully identified.