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The pharmacognostic standards of fresh, powdered and transverse sections of Stachytarpheta jamaicensis (SJ) leaf was carried out to determine its macroscopical, microscopical (both qualitative and quantitative), analytical standards and phytochemical profile. The macroscopy revealed a simple, glabrous, relatively thick and slightly fleshy leaf that is obovate with symmetrical base, bluntly acute apex, with a serrate-dentate margin. The qualitative microscopy of the powdered leaf shows xylem vessels with phloem parenchyma cells, epidermal cells with diacytic type of stomata, epidermal cells with anticlinal sinuous wall, palisade cells attached to epidermal cells, multicellular uniseirate trichomes, irregular shaped prism calcium oxalate, and small bundle of fibre. The quantitative microscopy of the leaf of SJ showed the values of palisade ratio, stomatal number (upper and lower epidermis), stomatal index (upper and lower surface), vein-islet number and vein termination number to be 4.42±2.53,(105.67±2.73, 277±17.08),(28.00±2.31, 21.00±2.51), 15.67±0.66 and 3.50±0.00 respectively. For the analytical standards; 11.85±0.06, 2.17±0.00, 8.80±0.14, 2.04±0.02, 2.51±0.15, 4.85±0.22 and 4.30±0.02 were obtained for total ash, water soluble ash, sulphated ash, acid insoluble ash, alcohol soluble extractive value, water soluble extractive value and moisture content respectively. The qualitative phytochemical analysis of SJ leaves showed the presence of carbohydrates, reducing sugars, alkaloids, glycosides, saponins, tannins, flavonoids, resins, proteins, steroids and terpenoids. These specific standards obtained through experimentation are of …