Abstract: There are about 1047 species of wild seed plants in the flora subregion of NE. China Plain, belonging to 98 families and 429 genera. According to their present distribution, the gen-era in the flora subregion can be classified into 15 areal-types and 14 subtypes, the species into 25 areal-types and 27 subtypes. Based on the areal-types and the arrangment of the families, the flora is temperate in nature, but it had some connection with tropical flora hostorically. It is unremarkable in endemicity, and shows obviously in the plantcomponent that it has connection with the forest flora in neighbouringmountains and is linked together with the prairie flora in the west. It states clearly that the flora is young and transitional in nature.

Key words: NE. China plain