I would think on a plant that size the seeds would be obvious... But I can't figure it out. There are occasional little round things that could be seeds, but they don't seem substantial enough. There are also little skinny things with fluff attached, almost like Liatris seeds, but again, they seem empty. Is it possible that they are all gone, not even one left? The seed site doesn't list it under Eupatorium or Eutrochium and I don't know where else to look. Can anyone help?