About Artemisia capillaris Thunb.
Artemisia capillaris Thunb., commonly called capillary wormwood and known as yīn chén hāo in Chinese, is a flowering plant species belonging to the wormwood genus Artemisia in the family Asteraceae. It is a biennial or perennial herb that reaches 30 to 80 centimeters in height, occasionally growing up to 100 centimeters tall. It has a vertical, woody rootstock, and usually produces one to a few slender, erect stems that are pale purplish to reddish brown and glabrous. Its leaves are covered in silky hairs. Basal leaves have short petioles, while middle stem leaves are almost completely sessile. Its synflorescence forms a narrow to wide panicle holding many small capitula, each of which contains 8 to 12 yellow florets. It produces tiny, oblong-ovate brown achenes that measure approximately 0.8 millimeters long. This species is native to Pakistan, the western Himalayas, Assam, all of China, Mongolia, the Korean Peninsula, Irkutsk Oblast, Primorsky Krai (in Russia), the Ryukyu Islands, and Japan. It has been widely introduced to Afghanistan, India, Nepal, Southeast Asia, all of Malesia, and Taiwan. It is used in traditional Chinese medicine.
