Flowers are self pollinating, containing both androecium and gynoecium. These two components are the androecium and gynoecium, respectively. Collectively the stamens form the androecium. In "Calotropis", gynostegium is present (formed by the fusion of stigma and androecium). In some cases, androecium and gynaecium may be fused. The stamens form a pale green or pink androecium 0.5 centimeters in diameter. The androecium (male organ) has six stamens, of which only three are fertile. The reproductive parts consist of both male (androecium) and female (gynoecium) parts (hermaphrodite). The androecium has two stamens and three staminodes, anther dehiscence is explosive. Flowers have a tetradynamous androecium, with four long and two short stamens. The stamens in a flower are collectively called the androecium. The male reproductive structure, the androecium, is polyandrous and contains six stamens, long. In some taxa, the androecium is formed before the corolla. Stamens may be called the "male" parts of a flower and collectively form the androecium. The androecium just presents two fertile stamens with sessile anthers dehiscing by longitudinal slits.