Refers specifically to Artemisia princeps, a plant used in traditional Japanese confectionery and herbal medicine. Also known as 蓬 (よもぎ).
See also: よもぎ
Japanese mugwort is used as an ingredient in kusa mochi.
Compound of 餅 (mochi, 'rice cake') and 草 (kusa, 'herb'), referring to its traditional use in making kusa mochi.