Production RegionsPrimarily produced in the Chinese provinces of Yunnan, Guangxi, Guangdong.
Macroscopic FeaturesOval, long cylindrical or irregular angled cut pieces, 0.3~1 cm thick. Cortex is grayish-brown, sometimes with grayish-white spots, reddish-brown color where the cork falls off. Out surface has reddish-brown or brown xylem, and numerous ducts; cortex has resinous secretions that appear reddish-brown to blackish-brown, alternating with the xylem in an arrangement that presents with 3~8 eccentric semi-circular rings; pith is off to one side. Hard texture, faint odor, astringent taste.
Quality RequirementsSuperior medicinal material has numerous resinous secretions.
PropertiesBitter, sweet; warm
FunctionsSupplements blood, invigorates blood, frees network vessels. Apply to irregular menstrual periods, hematasthenic flaccidity, numbness and paralysis, rheumatic arthralgia.
OriginThe dried vine of Spatholobus suberectus Dunn.(fabaceae).