The wild Lilium sulphureum,an important plant species that has medical and horticultural values,possesses bulbils as vegetative propagation.In this current work,we focused on the develpment of bulbil for L.sulphureum.Based on the morphological observation and anatomical study,the bulbil formation of L.sulphureum was identified.The bulbil was firstly appeared on the basal site of petiole in the axil.It originated from cells of sub-epidermal of petiole.The process of bulbil development could be divided into three stages:triggering phase,expanding phase,and ripeness phase.The maturated bulbils generally are spheral or ellipsoidal.The inner cells posses large mount of starch granule as storage assimilate.The germination rate of L.sulphureum bulbils is very high (>90%).This result showed that vegetative propagation of bulbils is an important way for ecological adaptation.