  artemisia annua, also known as sweet wormwood, sweet annie, sweet sagewort, annual mugwort or annual wormwood (), is a common type of wormwood native to temperate asia, but naturalized throughout the world. ==characteristics== it has fern-like leaves, bright yellow flowers, and a camphor-like scent. its height averages about 2 m, and the plant has a single stem, alternating branches, and alternating leaves which range from 2.5â5&nbsp;cm in length. it is cross-pollinated by wind or insects. it is a diploid plant with chromosome number 2n=18. ==medicinal uses== ===folk medicine=== in traditional chinese medicine, a.&nbsp;annua is traditionally used to treat fever. ===extractions=== in 1971, scientists demonstrated the plant extracts had antimalarial activity in primate models, and in 1972, the active ingredient, artemisinin (formerly referred to as arteannuin), was isolated and its chemical structure described. artemisinin may be extracted using a low boiling point solvent, such as diethylether, and is found in the glandular trichomes of the leaves, stems, and inflorescences, and it is concentrated in the upper portions of plant within new growth.{{cite journal |author=ferreira jfs, janick j |title=floral morphology of artemisia annua with special reference to trichomes |journal=int. j plant sci. |volume=156 |issue=6 |page=807 |year=1995 |doi=10.1086/297304
Artemisia_(genus) Flora_of_Afghanistan Flora_of_Azerbaijan Flora_of_Georgia_(country) Flora_of_Iran Flora_of_Russia Flora_of_Syria Flora_of_Turkey Medicinal_plants_of_Asia Plants_described_in_1753