In this report,a survey is presented of plants with C 4 photosyntnesis in China.We have recorded 533 C 4 species,40 varieties,3 subspecies and 8 C 3～C 4 intermediate species.These species belong to 160 genera and 24 families.Among them,97 species,8 varieties and 1 subspecies in 46 genera are from the Dicotyledoneae and 436 species,32 varieties and 2 subspecies in 114 genera from the Monocotyledoneae.Most of C 4 plants belong to Poaceae (96 genera,324 species,32 varieties and 2 subspecies),Cyperaceae (1...