Abstract:The male inflorescence bud is mixed type,dropping as a whole after anthesis. The male flower is minute,apetalous,calyx 2-lobed,stamens 4. As it is in flower,the calyx lobes open only at the sides and meet at the top but seldom open fully. The anther wall comprises an epidermis followed by a layer of endothecium,1 middle layer and a single-layered tapetum.The epidermis withers as the anther splits.The endothecium develops fibrous thickenings and the middle layer is ephermeral.The cells of the glandular tapetum become 2-nucleate and degenerate at the 2-celled pollen stage.On the inner tangential walls and radial walls are studded Ubisch bodies stripe-like"bridge" appear between Ubisch body and pollen wall. Meiosis of microspore mother cells is synchronous or unsynchronous. Simultaneuous cytokinensis in the microspore mother cells follows meiosis and the microspore tetrads are tetrahedral or isobilateral.The changes in the callose accumulation during microsporogenesis start on the corner and the periclinal walls of the microspore mother cell close to the vascular bundle of the filament,and gradually extends to the far end of the bundle. Pollen grains are 2-celled when shed,about 22.5μ in diameter.In SEM micrograph,the pollen grain is spherical,with an annular ridge around the equator which seems to divide the pollen into two halves and each half is tricolpate.The colpi bulge to form three beaks meeting at the equator.Pollen wall is decorated with warty dots.