Abstract
Coleus forskohlii (Willd.) Briq. is an important plant used against various disorders in indigenous systems of medicine, such as antiaging, antioxidant and as a remedy for heart, abdominal and respiratory disorders. In the present communication a detailed pharmacognostical study of roots of this plant procured from different geographical zones of India is carried out. Although all the samples show similar macro- and microscopic characters, there is remarkable variation in the percentages of coleonol, sugars, starch and protein in different samples. For instance, the percentage of coleonol is higher in Salem (3.11%) and Vijaywadah (2.202%) as compared to Agrakhal (1.139%) and Tarikhet (0.7319%); similarly, there is an almost four fold increase in percentages of sugar and starch in southern samples while the protein percentage is almost twice as high in northern samples. Further, a variation in heavy metal concentration is also observed.
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