It is supposed to be spearmint (scientific name: Mentha spicata Linn.), also known as green mint, fragrant mint, Dutch mint, green mint, scented cauliflower, fish mint. It is an erect perennial herb of the family Labiatae, with erect stems and purple or white flowers, flowering from July to September. Temperature adaptation range, like moist, like light, suitable for weak acidic soil. Stems and leaves can be extracted by distillation of lingzhi oil, which can be used as medicine or food.