Morphological Observation on Flower Bud Differentiation of Lilium formolongi Bulb

Anatomic observations were made in the terminal bud of Lilium formolongi'Raizan' during flower bud differentiation with the paraffin sections and scanning electron microscope(SEM).The results indicated that flower bud differentiation began at 20-30 days and finished at 50-60 days after planting.The process of flower bud differentiation lasted for about 40 days and could be divided into five stages,i.e.undifferentiation phase,initial differentiation phase,inflorescence and small floral primordium differentiation phase,flower organ differentiation phase,and the whole inflorescence formation.