In this fifth week of late summer, the final tier of wildflowers starts to open. White and violet asters, orange beggarticks, burr marigolds, tall goldenrod, zigzag goldenrod and Japanese knotweed come into bloom, blending with the brightest of the purple ironweed, yellow sundrops, blue chicory, golden touch-me-nots, showy coneflowers and great blue lobelia. Deep in the woods, the late wildflowers of this year coincide with the first growth of second spring, actually the first days of next