Medicinal plants are of great importance to the health of individuals and communities in general. Plants contain some chemical substances that produce definite physiological actions in and on the human body. The main aim of the present study was to evaluate the pharmacognostical properties and screen the bioactive constituents of Asystasia gangetica. Phytochemical screening of different extracts of the plant flower was carried out. The ethanol extract showed presence of maximum bioactive compounds including phenols, flavonoids, alkaloids, glycosides, tannins, terpenoids and saponins compared to other extracts. The yield and colour of the extracts varied with solvents and fluorescence analysis of powder was treated with various chemicals according to standard procedure. The results suggested that the plant flower possesses phytochemical constituents which are helpful to develop natural drugs to treat various diseases.