3.4. Development of staminate flowers
The floral meristem is disc-shaped at the beginning (Fig. 6a). Then, the abaxial side expands, becomes as sectorial (Fig. 6b). Petal primordia initiate subsequently as clockwise pattern, starting from abaxial side that overlapping with 1st stamen at abaxial side (Fig. 6c). Floral meristem expands at all sides (Fig. 6d). The 2nd stamen initiated, overlapping with 3rd and 4th petals (P3-P3) at the adaxial side. Subsequently, the 3rd stamen arises at abaxial side between 1st and 5thpetals (P1-P4) (Fig. 6e). The 4th and 5th stamens initiate at lateral sides of the floral meristem (Fig. 6f). Formation of 1st and 2nd sepals at abaxial side is simultaneous with elongation of the floral organs (Figs. 6g-i). Inception of carpel is synchronous with differentiation of stamen into short filaments and spherical anthers (Fig. 6j). The more differentiation of stamens into filaments and cordate anthers, the more development of the carpels (Fig. 6k). In mature flower, conical (Fig. 6l) and bilabiate (Fig. 6m) stylopodia and two sepals are developed (Fig. 6l-m). The longitudinal section of the carpels indicating that ovaries well developed but without ovules remnants.