Study on Stimulation Model of Growth Condition of Cymbidium hybridum Vegetative Growth Period Based on Production of Thermal Effectiveness and PAR Genetic Transformation and Detection of the Cymbidium hybridum Modified by Coat Protein Gene of ORSV Advances of Cymbidium hybridum ANATOMICAL STUDIES ON THE VEGETATIVE ORGANS AND THE PROTOCORM OF CYMBIDIUM HYBRIDUM Study on Stimulation Model of Growth Condition of Cymbidium hybridum Vegetative Growth Period Based on Production of Thermal Effectiveness and PAR Micropropagation of Cym bidium hybridum by Inducementof PLB from Cuted Ba se of in vitro Plantlets Advances of Cymbidium hybridum