Latin Name Pogostemon cablin. Plant Family: Labiate. Extraction Method The essential oil is distilled from the dried and fermented leaves. The younger leaves are used for the best scent. Country of Origin: India. A fast spreading tall aromatic grass which has small flowers, but the oil is taken before the flowers are allowed to develop. The oil is also known as gingergrass and East Indian Geranium. This oil has an earthy, musky, herbaceous base note which gives way to a sweet and spicy top note. Unlike many essential oils, Patchouli matures with age. For external use only.