Vessels of Sonneratia belonging to the family Sonneratiaceae, have so far been shown to have only simple perforations. However, in the present study, simple, scalariform, modified scalariform and reticulate types of perforations in the vessels of four species of Sonneratia have been found for the first time. Besides scalarifonn and reticulate perforations, a variety of intermediate forms have also been observed.
Although there have been some reports of occurrence of scalariform and modified scalariform types of perforation in vessels of some members of the Rutaceae, no such observation has so far been made in the woods of Euodia species. In two species, E. elleryana and E. lunuankenda, besides the scalariform type, irregular and regular reticulate types of perforation have been observed. Additionally, silica bodies have also been noticed in vessels, fibres and axial parenchyma.
The anatomical, physical and mechanical properties of non-coppiced and coppiced (after first felling) wood of Eucalyptus tereticornis were studied to evaluate their quality and to recommend it for various end uses. The pith to periphery variation in specific gravity, fibre length, fibre diameter, fibre lumen diameter, double wall thickness, vessel diameter and vessel element length were investigated in both types of wood. Correlation coefficients between anatomical characteristics and specific gravity and among anatomical characteristics were established. The results of physical and mechanical properties indicate that the timber from both non-coppiced and coppiced wood can be classified as very heavy, strong, tough, very hard but liable to warp and crack badly. The studies suggest that there is no significant difference in anatomical and mechanical properties of non-coppiced and coppiced wood suggesting their timbers can be utilized for similar purposes.