Characters of locally available barks of Holarrhena Antidysenterica, Wall

Genuine Burmese barks of H. antidysenterica were collected from 3-8 year old trees and their morphology and histology studied and recorded for use as distinguishing characters in checking against adulterations. The types of stone cells, calcium oxlate crystals and the medullary rays were studied. The dimensions of the stone cells and calcium oxalate crystals did not appear to give a reliable index for the differentiation of the ages of the plant of barks as far as 3, 4, 5 and 8 year old barks were concerned.