Abstract: The purpose of this study was to identify the characteristics of the internal struc-ture during flowering stalk formation assooiated with high quality and yiedl of Brassioaparachinensis Bailey. From the initiation of stalk formation till harvest , the subapical portionof the stalk maintained dividing capacity.The parenchyma of the cortex and the pith werewell developed.CellS were small and arranged closely with few and small intercellular spaces.The vascular bundles in the subapicsl stalk were small and unlignified.Such characteristicsrevealed the high quality of the flowering stalk.In the middle part of the stalk ,the parenchy-ma cells were not arranged so closely with larger intercellular spaces.Due to the dividing ca-pacity of the cambiumm the internode elongation and the broadening growth of the stalkwould be maintained and the yield increased.As for the basal part of the stalk ,the amount ofvascular bundles in the xylem were more than that in the phloem.The parenchyma cells inthe cortex and pith were arranged scatteredly and the intervals were more and larger withmany vascular bundles.The proportion of secondary xylem increased and the vessels werebigger and lignified ,thus having no edible value because of the low quality.