Pharmacognostical study and preliminary phytochemical screening of the roots of Tagetes erecta Linn

Tagetes erecta Linn. [Compositae] was studied to fix the parameters for pharmacognostical standards. The present investigation deals with macro and microscopical characters of root along with studies of histochemical colour reaction, fluorescence nature of root powder and different solvent extractives of root under ultraviolet and visible radiations. Physical constants like ash values and extractive values were also studied in addition to the preliminary phytochemical screening of successive extracts of the roots of Tagetes erecta Linn