Flowers in Ailanthus altissima develop from early April, starting with the calyx, then petals, stamens, and finally carpels. Sepals and petals grow slowly compared to stamens. Stamens are arranged in two whorls, while carpels quickly form the gynoecium. In hermaphrodite flowers, carpels become the style and stigma, while in staminate flowers, they turn into anthers and filaments. Both types of flowers start developing in a similar way, but staminate flowers suppress gynoecium development. The transition from bisexual to unisexual flowers in A.altissima is due to the differentiation of floral primordia forming reproductive structures. Further research is needed to fully understand this transition.