BIOMORPHOLOGIC CHARACTERISTICS OF STEVIA REBAUDIANA (BERTONI) HEMSL. IN GENERATIVE AGE STATE
A growing season of Stevia rebaudiana (Bertoni) Hemsl. introduced in the south-east of Ukraine is 255-275 days. Generative age state is induced by a shorter photoperiod, though is limited by lower average daily temperatures in the autumn. The structural typification of inflorescence enabled us to determine S. rebaudiana synflorescence as a determinant racemous alternate pleiothirsus, consisting of modules and floral units. In terms of anthecological features of this species we have noted: retarded flowering; mixed type of flower opening; day type of flower opening; male and female phase succession; flowering duration.