A Study on Flower Bud Morphological Differentiation of Lagerstroemia indica cv.

Flower bud of Lagerstroemia indica cv.turns from middle or topper bud of auxiliary shoot and terminal bud and the flower bud differentiation process lasted about 30d from late April to late May.The paraffin cut was used to ob- serve the developing process of the flower bud differentiation.The results showed its differentiation includes two proces- ses of differentiation of inflorescence and of floret.The process can be divided into 8 phases,vegetative,initial,inflores- cence primordium,single flower primodium,sepal,petal,stamen and pistil differentiation phase.The differentiation of inflorescence and single flower is outward and centripetal respectively.And there is some relative between the flower bud differentiation and the growth of shoots.