Witnessed by: TCM

Rui ren (Prinsepia uniflora), of the Rosaceae family. Thorny deciduous shrub of dry stony hillsides, narrow leaves and small white flowers, bearing a small dark drupe; native range: Dry hills and stony slopes of northern and north-western China — Shaanxi, Shanxi, Gansu, Inner Mongolia and Henan. Globally recognized as rui ren (蕤仁), rui he (蕤核), bei rui ren (北蕤仁) in Chinese, and cherry prinsepia, hedge prinsepia in English. The part used is the seed kernel, freed of its shell. A small, smooth, pale kernel within a hard brown stone, oily and blandly sweetish with a faint bitterness.

In this cross-tradition database, we analyze how this substance operates across world medicine systems — tracking its traditional tastes, temperatures, tissue affinities, post-digestive effects, and planetary correspondences across Ayurveda, Unani, and Western herbalism.

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