Uuder the condition of waterlogging stress, the growth, photosynthetic characteristics, physiological characteristics and changes of the intra-structures of the different provenances of Liriodendron chinense and hybrid tulip-tree were analyzed, some results had been gained as the following.(1). After the waterlogging stress for two days, both high growth and survival rate decreased for different provenances of L.chinense and hybrid tulip-tree. Coefficient analysis indicated that, between the stress time and...