Objective: To evaluate Curcuma longa rhizome by pharmacognostic and phytochemical analysis and standardize one of
its formulations by HPLC. The present work includes macroscopic study, microscopic analysis of cross section and powder
of rhizome, fluorescence analysis, qualitative and quantitative phytochemical assay and chromatographic fingerprinting of
its polyherbal formulation, Pathyashadangam kwath using curcumin as marker carried out as per standard laboratory
procedures. The study helps to provide both diagnostic features for identification and preventing adulteration of Curcuma
longa L and HPLC chromatogram for standardisation of its formulation. Results: Microscopic analysis revealed the
presence of a broad parenchymatous cortex with abundant starch grains in the cross section, spiral vessels, starch grains
having hilum towards the narrower end, fibres and cells with oleo resin in powder microscopy. HPLC analysis revealed
the presence of three peaks corresponding to curcuminoids in the formulation. Conclusion: Pharmacognostic and
phytochemical evaluation can be used for confirming the identity of Curcuma longa rhizome and HPLC using curcumin
as marker can be used for standardisation of its formulations.