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The Meyna laxiflora Robyns belongs to the family Rubiaceae. In the present work, pharmacognostic studies of this medicinal plant was attempted which included physicochemical, phytochemical, macroscopic, microscopic studies and organoleptic evaluation. The plant powder characteristics were also elucidated. The physicochemical analyses were done by using WHO recommended parameters such as loss on drying, ash values (total ash, water soluble ash, acid insoluble ash, sulphated ash, carbonated ash, and nitrated ash), extractive values and Foaming index. The seeds were vertically oblong and elliptical in outline. The surface is reddish brown, smooth and membranous. Microscopical study depicts a elliptical in outline and shows thin dark seed coat enclosing massive perisperm and cellular endosperm with a central embryo. The powder of the seed consists of abundant seed coat sclereids and parenchyma cells of cotyledons. Foaming index value of powdered seeds of M.laxiflora Robyns was less than 100. Qualitative Phytochemical Analysis of ethanolic and aqueous extracts of powdered seeds of M.laxiflora Robyns showed the presence of Alkaloids, Tannins and Phenolic compounds, Flavanoids, Seroids, Proteins and amino acids. The pharmacognostic characters enlisted in this study will help in identification of the crude drug; the standardization parameters laid down will ensure the efficacy of drug and also distinguish the drug from its adulterants. The distinguishing characters will also be helpful for the preparation of monograph of this plant.


Meyna laxiflora Robyns macroscopic microscopic cotyledonous Phytochemical

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Janarthanan. L, & Venkateswarlu B.S. (2021). Pharmacognostical, physicochemical investigations and phytochemical of seeds of Meyna laxiflora Robyns. International Journal of Research in Pharmacology & Pharmacotherapeutics, 7(4), 455-465. Retrieved from


  1. 1. Chanda S. Importance of pharmacognostic study of medicinal plants: an overview. J Pharmacogn Phytochem. 2014; 2(5): 69-73.
  2. 2. Husna SA, Reddy VJ. A review on Argemone mexicana. Int J Pharmacol Res. 2017; 7(09): 170-174.
  3. 3. Banerjee J, Chauhan N, Dey BK. Pharmacognostical, physiochemical and phytochemical evaluation of leaf, stem and root of Orchid Dendrobium ochreatum. J Appl Pharm Res. 2018; 6(1): 16-25.
  4. 4. Evans WC. Trease and Evans Pharmacognosy. 15th ed. London: W.B. Sanders, 2002.
  5. 5. SK Gupta. ”Drug Screening Methods", 2nd edition, Jaypee Brothers Medical Publishers, New delhi. 2009: 480-498.
  6. 6. Sourabie TS, Ouedraogo N, Sawadogo WR, Nikema JB, Guissou IP and Nacoulma OG. Biological evaluation of anti-inflammatory and analgesic activities of Meynalaxiflora. aqueous leaf extract. International journal of pharma sciences and research. 2012: 3:451-8.
  7. 7. Sass, J.E.1940. Elements of Botanical Microtechnique. McGraw Hill Book Co; Newyork. PP.222.
  8. 8. Brien’OTP: Feder, N. and Mc cull, ME.E.1964. Polychromatic Staining of plant Cell walls by toluidine blue-O. Proroplasma; 59:364-373.
  9. 9. Metcalfe, C.R.and Chalk, L.1950, Anatomy of Dicotyledons, Vol.I & II. Clarendon Press, Oxford.
  10. 10. Dhar.B., Billore.K.V., Gupta.O.P., (2003) An evaluation of some controversial Ayurvedic Drugs of Indian Pharmaceutical industry. Recent progresses of Indian Medicinal Plants 1st edition vol-1 P.307-309.
  11. 11. Metcalfe, C.R.and Chalk, L.1979, Anatomy of Dicotyledons, Vol. I Clarendon Press, Oxford pp.276.
  12. 12. Khandelwal KR. Practical Pharmacognosy. 19th edn. Pune, India: Nirali Prakashan. 2008; 49-70.
  13. 13. Tyler V, Brady L, Robber J. Pharmacognosy, Varghese Company, India, 1977; 103-141.
  14. 14. Evans WC. Trease and Evans Pharmacognosy. 15th ed. London: W.B. Sanders, 2002.
  15. 15. Sofowora A. Medicinal plants and traditional medicine in Africa. 3rd ed. Ibadan: Spectrum Books Limited, 2008.
  16. 16. Committee of British Pharmacopoeia. British Pharmacopeia. Vol. III. Herbal drugs and herbal drug preparations. London: The Stationery Office, 2009.
  17. 17. Agrawal SS, Paridhavi M. Herbal drug technology. Hyderabad: University Press (India) Private Limited, 2007.
  18. 18. Sarker SD, Latif Z, Gray AI. Natural products isolation. 2nd ed. Totowa: Humana Press Inc., 2006.