The Comparison of Wood and Bark Anatomy on Three Pulai Species

Pulau Alstonia sp.J belonging to the family Apocynaceae, produces latex which is .frequently used as a traditionalmedicine.Variousliteratureson 111edicinal tree species.frequently mention about it, but a description of the wood and bark anatomy of pulai up to the species level is hardly found Anatomical structure of wood and bark of Alstonia scholaris, A. angustiloba and A. pneumatophora were observedon samplesproduced using a microtome. Dimensionsof woodfiber and vesselcells also weremeasured Observations showed that the three species of pulaiwood can be distinguished'from the differences in diameter and.frequency of vessel cells, type and arrange111ent ofparenclly111a cells, width and composition of the rqycells. The bark of these species can be distinguishedbased on theform of sklereid cells and thepresenceof dilationed rqycells (IPideningrqycell).