The gold blows away. By this time, in Michigan, the golden flowers have turned to fluff. The fluff is of course designed to blow away, spreading the seeds. Which brings us to another unanswered question. How do woodland goldenrods find enough wind to get that job done? Hmm. Maybe there's the answer to the larger heads puzzle? Do larger heads produce longer fluff. Is that then more effectively moved by whatever breeze finds its way among the trees? The one shown here is bluestem goldenrod.