Swertia Perennia is a perennial herb that goes by various names including perennial swertia and Japanese swertia. However, there are several synonyms for this herb, which are used interchangeably. These synonyms include: - Swertia japonica - Swertia perennis - Swertia japono-chirayita - Swertia kozosho - Swertia nervosa These synonyms describe the same plant species as Swertia Perennia. It is an herbaceous plant that typically grows in moist soils and has been used in traditional medicine for its bitter compound properties. The various synonyms for this herb indicate how it has been identified and classified in different regions around the world, but they all reference the same species.