An attempt to throw further light on Morphology , anatomy of Commelina benghalensis weed . Addition to evaluate the secondary metabolites and antimicrobial activity and composition analysis of this plant. Proving that the herb showing CAM characters as a plant. In conclusion, the harmful weed, Commelina benghalensis, being rich in secondary metabolites as revealed in this study, might be of a very important medicinal value and should be investigated further for new drug and as cheap fodder for field animals and Birds.