Planting and the use of herb plants have grown to be a trend in recent years. To showcase the enchanting beauty of these multipurpose plants, Chunghwa Post is issuing a set of four stamps featuring Mentha × piperita, Rosmarinus officinalis, Salvia elegans, and Artemisia indica. The designs follow:1. Mentha × piperita (NT$5): It is a perennial herbaceous plant of the family Lamiaceae. The plant has opposite, ovate or oval-shaped leaves. The flowers are either white or pink, and grown in whorls. It is edible, medicinally useful, and a common ingredient in essential oils, pesticides and pest repellants. 2. Rosmarinus officinalis (NT$5): It is a woody, perennial plant of the family Lamiaceae. The leaves are opposite, long and narrow; the colors are rich green, with a pleasant sheen. The flowers are blue, white or pink. The plant is edible and extensively used for medicinal purposes. It is also a common ingredient in essential oils and bath products. 3. Salvia elegans (NT$12): It is a perennial herbaceous plant of the family Lamiaceae. The leaves are either ovate or heart-shaped; they emit a mild, fruity fragrance when brushed or rubbed. The flowers are red. The plant is edible. 4. Artemisia indica (NT$15): It is a perennial herbaceous plant of the family Asteraceae. The leaves are pinnate, green, with dense white tomentose hairs on the underside. When they just bloom, the flowers are light yellow. The plant is edible and a medicinal herb. It is also used in essential oils, scenting, and folk practices.