One of the most interesting internal features of the several species ofRhizophora has been the presence of varied types of foliar sclereids. This feature has been examined with a view to find out their utility in the satisfactory revision of this genus.

One of the most interesting endomorphic features of several species ofBoronia has been the discovery of varied types of terminal sclereids and tracheoids throughout the leaf expanses. Their typology has been examined with a view to find out their diagnostic or taxonomic value and also in solving problems of nomenclatural synonymy in the systematic treatment ofBoronia.