Mesona is a genus in the mint family (Lamiaceae). Exemplar species in this genus are the Mesona procumbens Hemsley and the Mesona chinensis, generically called xiancao (仙草) in Mandarin Chinese, sian-chháu in Taiwanese, and leung fan cao (涼粉草) in Cantonese, sương sáo in Vietnamese. It is said to be a diuretic, used in Taiwan as a hot, viscous drink, or set as a gel and served as a grass jelly.
Dracocephalum is a genus of about 45 species of flowering plants in the family Lamiaceae, native to temperate regions of the Northern Hemisphere. They are annual or perennial herbaceous plants or subshrubs, growing to 15-90 cm tall.