Artemisia annua, also known as Sweet Wormwood, Sweet Annie, Sweet Sagewort or Annual Wormwood, is a common type of wormwood that is native to temperate Asia, but naturalized throughout the world.
Artemisia annua f. macrocephala Pampanini; A. chamomilla C. Winkler; A. stewartii C. B. Clarke; A. wadei Edgeworth. Herbs, annual, 70-160(-200) cm tall, much branched, sparsely puberulent, soon glabrous, strongly aromatic. Leaves gland-dotted. Lowermost stem leaves: leaf blade ovate or triangular-ovate, 3-7 × 2-6 cm, 3(or 4)-pinnatipartite; segments 5-8(-10) pairs. Middle stem leaves: petiole 1-2 cm; leaf blade 2(or 3)-pinnatisect or pectinatisect; lobules deeply serrate to pectinate; teeth triangular, 1-2 × ca. 0.5 mm; rachis narrowly winged, sparsely serrate or not; midvein prominent adaxially. Uppermost leaves and leaflike bracts 1(or 2)-pinnatipartite. Synflorescence a panicle to 15 × 8 cm, produced from most nodes to form broad, conical compound panicle.