Artemisia sp - NOT Youngia yoshinoi
At one of our local NARGS Chapter plant sales, I came home with a plant identified as Youngia yoshinoi - rare and endangered species, 40 cm, from NARGS 2006-7 seed exchange. It had nice silvery dissected leaves. Overwintering just fine outdoors, it did not flower in the spring, but the stems elongated and eventually in autumn it flowered. It turns out to be a tall Artemisia species, not Youngia at all. Youngia is an obscure Asian genus, its members sometimes separated or lumped under more familiar genera Prenanthes or Lactuca.