300 accessions of wild kenaf and 337 cultivated varieties were identified.The results showed there were distinct differences among stem,leaf,flower,fruit etc.botanic characters,and it indicated abundant genetic diversity of kenaf germplasm in China.Chromosome number of wild kenaf were also 2n=36 and,that belonged to kenaf species(Hibiscus cannabinus L.).Various chromosomal karyotypes were found,such as 2n=36=32M+2SM+2M(SAT),2n=36=34M+2M(SAT),2n=36=32M+2ST+2M(SAT).Wild kenaf can be classified into 4 types by morphological characters differences,such as normal,hairy,helical flower and flat global fruit.The normal type was the most intimate to cultivated kenaf and can be further classified into 3 sub-types.It also indicated wild kenaf has subspecies.Cultivated kenaf can be classified into 9 varieties and 17 types,among which 4 of the varieties and 7 of the types are new discoveries.