Objectives of the research was to investigate macroscopic, microscopic, qualitative phytochemical and pharmacognostic parameters of Solanum trilobatum (Tuduvalai) leaves, it is one of the important medicinal plants, more commonly available in Southern India and has been used in herbal medicine to treat various diseases like respiratory problems, bronchial asthma and tuberculosis. The plant is also used in preparation of variety of indigenous medicine. Macroscopic, microscopic, qualitative phytochemical analysis, extractive values in petroleum ether, chloroform, methanol and DMSO of the leaves were done. Macroscopic and microscopic study showed distinct morphological characteristics in the leaves. Phytochemical analysis of leaves powder revealed that alkaloids, carbohydrates, proteins, amino acids, phytosterol, tannin, glycosides, saponins, flavonoids and terpenoids were present in leaf extracts. Pharmacognostic study of leaves were helpful to identification and ensure quality and purity standards of tuduvalai (Solanum trilobatum). The qualitative phytochemical screening is helpful in further pharmacological approaches.
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