1 The androecium is borne on the fused corolla.

2 Flower: There are perianth, androecium and gynoecia on receptacle.

3 The androecium is borne on the fused corolla, just bellow the five sepals and five petals, which are arranged alternately.

4 The stamen initiated in non-direction, and when the androecium has more stamens, the inner initiated first, then the outer.

5 The growth period of Mitrastemon can be divided into four stages: bud, anthesis (androecium and gynoecium ), fruit, and seed.

6 The flower is bisexual, hypogynous , and with protandrous, tubular androecium whose anther are fused in a broad ring.

7 Epigyny The type of flower structure in which the perianth and androecium are inserted above the gynoecium , giving an inferior ovary, fused with the receptacle.

8 The present status and prospect of studies on specific genes for development of androecium, pistil and petals of higher plants are reviewed in this paper.