Fig. 346. - Annual Wormwood (Artemisia annua). X 1/4.
Nearly as rapid a grower as a ragweed, the stem two to five feet tall, smooth, much branched, and leafy. Leaves alternate, two to six inches long, smooth and green on both sides, very sweet-scented, twice or thrice pinnatifid, the lobes short, obtuse, and narrow; lower leaves with short, slender petioles, upper ones sessile and much smaller, but none entire. Heads very small in loose, open panicles, the florets all fertile; involucre hemispheric, the bracts few, smooth, dry and scarious. (Fig. 346.)
For small areas hand-pulling before the flowers mature. Or close and repeated cutting for the purpose of preventing reproduction.