392PHARMACOGNOSTICAL STUDIES OF BIOPHYTUM SENSITIVUM Dc STEMBiophytum sensitivum Dc. stem (Family: Oxalidaceae) are used for various medicinal values in traditional system of medicine. But the scientific validity of the stem was not yet reported till date. Pharmacognostical studies mainly include study of morphological characters, microscopical characters and powder microscopy. The aim and objective of this study is to discover the similarities and difference in the plants, indicating their closer relationship with their descents from common ancestry. It is a scientific way of naming, describing and ranging the plants in an ordered manner007vasuki@gmail.comResearch4122013Biophytum sensitivum,Root,Pharmacognosy,Powder microscopySenthamarai R,Vasuki K Department of Pharmacognosy, Periyar College of Pharmaceutical Sciences, Trichy 620 021, Tamilnadu, India,Department of Pharmacognosy, Swamy Vivekanandha College of Pharmacy, Tiruchengode 637 209, Tamilnadu, India