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Comparative pharmacognostical and phytochemical evaluation of Eucalyptus tereticornis and Mentha arvensis

Pichandy Muthuprasanna, Malarkodi Velraj, Kannaiyan Suriaprabha, Antony Joseph, Koil Raj

The macroscopy, microscopy, quantitative microscopy, powder microscopy, physical constants, preliminary phytochemical analysis and TLC were carried out for Eucalyptus tereticornis and Mentha arvensis and a comparative study was done. Microscopically Eucalyptus tereticornis showed anamocytic stomata, large oval schizogenous oil glands, rosette and prismatic crystals of calcium oxalate and fibro vascular bundles distributed throughout the parenchyma. Chemical analysis showed the presence of sterols, tannins and volatile oils. Quantitative microscopy showed the presence of stomatal number in upper epidermis as 11.2/mm2. Determination of total ash, acid-insoluble ash, water soluble ash, extractive values of mentha arvensis and eucalyptus tereticornis were carried out by using standard procedure. Microscopically Mentha arvensis showed the presence of crescent shaped collateral vascular bundle and diacytic type of stomata with covering and glandular trichomes. Quantitative microscopy showed the presence of stomatal number in lower epidermis as 15/ mm2.Stomatal indexwas found to be 12.8. Determination of total ash, acidinsoluble ash, water soluble ash, extractive values of mentha arvensis and eucalyptus tereticornis were carried out by using standard procedure. Therefore these characters can be used as an evaluation or identification of the plant.