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Pharmacognostic studies on centella asiatica (L) urban
S Jelani1, F Jabeen, M Prabhakar
1Plant Anatomy and Taxonomy Laboratory, Department of Botany, Osmania University, Hyderabad 500 007, India .
Ancient Science of Life
|May 5, 2012
Summary
This study details the pharmacognosy of Centella asiatica (L.) Urban, covering its morphology, anatomy, and chemical makeup. Key findings include specific stomatal types, calcium oxalate crystal distribution, and unique hair structures, crucial for plant identification.
Area of Science:
- Pharmacognosy
- Botany
- Plant Anatomy
Background:
- Centella asiatica (L.) Urban is a medicinal plant with diverse applications.
- Detailed pharmacognostic studies are essential for its correct identification and quality control.
Purpose of the Study:
- To conduct a comprehensive pharmacognostic analysis of Centella asiatica.
- To document its morphological, anatomical, and powder characteristics.
Main Methods:
- Microscopic examination of leaf, petiole, rhizome, and root.
- Analysis of stomatal types, trichomes, venation, and vascular bundles.
- Identification of calcium oxalate crystal forms and distribution.
Main Results:
- Stomata observed: anisotricytic, isotricytic, and tetracytic.
- Sphaero-crystals of calcium oxalate present in leaf, petiole, and rhizome, absent in roots.
- Uniseriate flagellate conical hairs found on abaxial leaf surface and petiole.
- Distinct vascular bundle arrangements in midrib, petiole, rhizome, and root.
- Powder microscopy revealed epidermal fragments, mesophyll, crystals, trichomes, and tracheary elements (annular, helical, pitted).
Conclusions:
- The study provides detailed morphological and anatomical data for Centella asiatica identification.
- These findings contribute to the standardization and quality assessment of this important medicinal plant.
