The present paper deals with the phytochemical and antimicrobial screening of therapeutic importance fromCostus speciosus(Koen.), an important medicinal plant. The study involves the preliminary screening and qualitative HPTLC separation of secondary metabolites from the rhizome ofCostus speciosus(Koen.). Thein vitroantibacterial activity was performed against a few pathogensviz. E. coli, Staphylococcus aureus, Klebsiella pnuemoniaeandPseudomonas aeruginosa. The generated data has provided the basis for its wide use as the therapeutic both in traditional and folk medicine.

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Mineral content was quantified in Oroxylum indicum L.(Vent.) collected from two different geographic regions of India viz. Western Ghats (Maharashtra) and Northern Uttar Pradesh. The main aim of this study was determination of elemental composition in different parts of the plant Oroxylum indicum L.(Vent.), which is extensively used in Ayurvedic preparations. Specific parts (leaves, stem and root) often used in Indian ayurvedic system were analyzed for 10 elements viz Cu,Na,Ca,Cr,Mn,Fe,Ni,Cd,Zn and Pb by employing ICPES techniques. All of the detected values for metallic elements in plant studied here were found to be below the WHO permissible levels. The elemental concentration in different part of medicinal plants and their biological effects on human beings are discussed.

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