In this paper the general pith behaviour including the lacunae formation in the hollow culm internode and development of string like processes from nodal partition walls in Dendrocalamus giganteus Munro have been discussed. The young shoot in D. giganteus is solid, conical and covered with imbricating sheaths. It consists of solid massive tissue which ultimately develops into hollow internode with transverse partition wall without any outgrowth. The young shoot in solid state appears as dark coloured cross bars separated by light coloured parenchymatous tissue. The dark coloured zones become the nodal partition walls. The lacuna’ develops through disintegration of coloured zones.

The string like process that develops from the nodal partition wall is an abnormal behaviour of the pith. It consists of vascular bundles and parenchymatous tissue. The vascular bundles are of type III of Grosser and Liese (1971).

Physical properties, such as, specific gravity, volumetric shrinkage and moisture content of Eucalyptus teriticornis have been studied from the pith to periphery and bottom to top position. Results show that specific gravity increases radially from the pith to outward, but decreases near the periphery. On the other hand, specific gravity increases significantly as the height increases. In the case of volumetric shrinkage, no such trend of variation has been observed. Moisture content decreases significantly from the bottom to top, whereas it docs not show any change from the pith to periphery.