Pharmcognostical Standardization of Oldenlandia umbellata L.-An Important Medicinal Plant

Background

Oldenlandia umbellata is a notable medicinal plant traditionally used to treat respiratory diseases, with its roots producing a red-coloured anthraquinone-based dye. Ensuring clinical efficacy with Oldenlandia umbellata necessitates identifying the authentic drug and its standardization.

Objectives

This study aimed to establish phyto-pharmacognostic standards for Oldenlandia umbellata.

Materials and Methods

The standardization process encompassed macroscopic and microscopic examinations, organoleptic analysis, preliminary phytochemical evaluation, fluorescence studies, and HPTLC analysis.

Results

Microscopic analysis of the roots revealed distinct features such as well-developed secondary growth, raphides and calcium oxalate crystals in the cortex, and lignified xylem fibres in the xylem tissue. Stem microscopy showed thin-walled and suberized phellem cells along with raphides. The leaf structure displayed a conjoint, collateral vascular bundle and paracytic stomata, with two subsidiary cells and raphides in the mesophyll. Physicochemical values were assessed, including total ash content (7.075%), water-soluble ash (1.725%), the alkalinity of water-soluble ash (0.35375 mL), and acid-insoluble ash (1.06%). Preliminary phytochemical analyses revealed the presence of secondary metabolites in two solvent systems. HPTLC analysis identified significant phytoconstituents with various R_f values.

Conclusion

These phyto-pharmacognostic studies of Oldenlandia umbellata facilitate the differentiation of the plant sample from other botanical sources within the same genus and authenticate the original drug.