DEVELOPMENTAL STUDIES On THE ANOMALOUS SECONDARY THICKENING IN THE ROOT OF MEDICINAL SPECIES OF Achyranthes bidentata BI. Studies on "floating sugar" mechanism in root of Achyranthes bidentata Accelerated solvent extraction of ecdysterone from Achyranthes bidentata Advances in studies on biology and chemical constituents in Radix Achyranthis Bidentatae Changes of Polysaccharides Contents in the Cell Suspension Cultures of Achyranthes bidentata