Nature's first green may be gold, notes Robert Frost in his classic poem, "Nothing Gold Can Stay," but the floral world is anything but hesitant about offering up gold in later days. Consider, of course, the Goldenrods, the very signature flowers of September. They, and their Aster buddies, are now lording it over the landscape, and if Frost suggested that gold might not have staying power, well, he might consider reconsidering. However, not all Goldenrods are, in fact, golden. Towards the middle of the Solidago clan reign, an oddball emerges, a not-Goldenrod known as Silver-rod. Solidago bicolor is, according to botanists, a bona fide member of the golden family, but as is often the case among family members, it doesn't look like it belongs. Still, we welcome it to the fold. After all, we don't always have to look alike to be kin.