Abstract: The observation on the structure of protocorm of Cymidium sinense shows that inner structures of protocorm and rosette protocorm are similar although their outer forms are different. Buds occur on the protocom and node and end of rosette protocom. Embryoid like structure is formed by shoot apical meristem and root apical meristem and it is similar with seed embryo. According to development and structure, protocom and rosette protocom is considered as a vegetative propagational organ. In addition, the large crystal cells can be observed in the leaf primordia of Cymidium sinense .