Production RegionsPrimarily produced in the Chinese provinces of Sichuan, Fujian, Guangdong, Guangxi.
Macroscopic FeaturesRhizome is cylindrical, apex is relatively pointy, base is blunt and round, 2~6cm long, 2~3cm diameter. Externally pale yellow. Slightly wrinkled; upper portion has obvious ring striations, which has scale-like remnants of leaf stem; both sides has one line of spotty lateral roots for each. Firm texture; fractured surface grayish-brown, waxy, often with grayish-brown powder. Inner cortex is round circle-shaped, stele occupies a large portion. faintly aromatic odor; slightly bitter and acrid taste.
Quality RequirementsSuperior medicinal material is firm with a potent aroma.
PropertiesAcrid, bitter; warm.
FunctionsBreaks blood, disperses accumulations, moves qi, relieves pain.
Processed FormVinegar e zhu: cleaned e zhu infiltrate with appropriate amount of rice vinegar and water, boil till all the vinegar are absorbed, cut surface is not white in the center, take out and cool, slice into thick pieces, the dry. Every 100kg of e zhu need 20kg rice vinegar. Vinegar processed form lead the medicinal material into liver channel and blood system, enhance the effect of dispersing accumulations and relieving pain.
OriginThe dried rhizome of Curcuma phaeocaulis Val.(Zingiberaceae).