Or did my memory do a major nosedive? I'll explain:
Below is the perfectly good, expected even, result of planting a rhizome in spring. Helenium "Moorheim Beauty" gradually emerged from the ground and commenced blooming with dusky red flowers that turn a little golden as they age.
But what IS this growing so apparently legitimately right next to it?
It's pretty interesting, and so healthy I hope it isn't some major garden marauder weed. For now, I'm willing to give it some space, and see what develops.
Of course, if you recognize it, do let me know.