A comparative morphology study was carried out deference groups on stamen and gynoecium of 6 species of Annonaceae.  Six species were studied:  Desmos chinensis Lour. Fl., Desmos cochinchinensis Lour. Fl., Polyalthia sumatrana (Miq.) Kurz., Polyalthia oblique Hk. F et. Thoms., Polyalthia lateritia J. Sinclair and Polyalthia asteriella Ridley.  These reproductive organs were collected from Bangi Reserve Forest and Pasoh Reserve Forest in Malaysia. They were acetolysed (1) and dried by CPD method.  The types that were studied via scanning electron microscopy were mounted stamen and gynoecium material shape.  

Results obtained showed that stamens and gunoecium have a same type on Desmos chinensis Lour. Fl. and Desmos cochinchinensis Lour. Fl. They are Type 13 (stamen) and Type D (gynoecium).  For Polyalthia we fine that two difference types stamen and gynoecium in the order; Polyalthia sumatrana (Miq.) Kurz. and  Polyalthia asteriella Ridley in Type 8 (stamen) and Type D (gynoecium);  Polyalthia oblique Hk. F et. Thoms. and Polyalthia lateritia J. Sinclair in Type 14 (stamen) and Type I (gynoecium).  The data show significant difference between the genera examined and are congruent with the some species on Annonaceae.  Variation in stamens and gynoecium ultra structure could be used as additional characteristic between he species studied.