Botanical Overview
San mian dao (Cimicifuga japonica) is a species in the Ranunculaceae family. The buttercup family (Ranunculaceae) includes herbs with alternate or basal leaves and showy flowers with numerous stamens and pistils. Many species contain protoanemonin and other acrid compounds that cause skin irritation. Despite their toxicity, several species have been used in traditional medicine for pain and inflammation. Phytochemical data for this species are limited at present.

General Description
It is native to central and southern China including Hainan, Jeju Island in South Korea, and central and southern Japan. A perennial, the Royal Horticultural Society considers it to be a good plant to attract pollinators.
Family Context
The Ranunculaceae family is widely distributed in temperate regions. Notable medicinal members include:
- Black Cumin — 29 documented uses
- Goldenseal — 29 documented uses
- Bugbane — 28 documented uses
- Black Cohosh — 24 documented uses
Geographic Distribution
San mian dao has been recorded in 8 countries and territories worldwide, including Austria, China, Germany, Denmark, Japan, and others.
Active Compounds
Phytochemical research has identified 4 compounds in this species, including a diverse array of phytochemical classes (see the Complete Chemical Inventory below for the full list).
The identified compounds include the following categories:
- Flavonoid: antioxidant compounds that protect cells from oxidative damage
Research Status
Although this species has documented phytochemical constituents, its ethnobotanical and clinical documentation remains incomplete. Systematic pharmacological studies are needed to validate the traditional uses attributed to this species.