An Underappreciated Plant Is...
bottlebrush buckeye. I only have one plant, and I thought I'd lost it after the hurricane, because a big pine tree fell on it. I didn't see it again for several years, then it popped up a few years ago from the root! I usually order some plants in the spring, then pot them up and plant them out in the fall or winter, so I think next spring's plants will be bottlebrush buckeyes. They like shade, and there's plenty of that in my woods. The only negative is that they only bloom once a year, but it's at a time when few native plants are blooming, at least not any that are rich in nectar.
It's blooming now - only one big bloom - and the butterflies are enjoying it. It must have a good bit of nectar, because once a butterfly gets on it, they stay a long time, really working the flowers, and run off any other butterfly that wants to join them. This female pipevine swallowtail spent a LONG time on it.