Abstract: Abstract The karyotypes of five species of Paris, i. e, P. cronquistii (K2n=2x= 10+2bs=6m+4t+2bs), P. vietnamens is ( K2n = 2x = 10 = 6m + lst+ 30 P. delavayi (K2n = 2x = 10 + ibs = 6m+4t+ibs) , P. forrestii ( K2n=2x= 10+2bs=6m+4t+2bs) , P. vaniotii (K2n = 2x = 10 = 6m+4t)were analysed based on cells at mitotic metaphase. Origin of the materials used in this work are pro-vided in Table 2 f the micrographs of mitotic metaphase of 5 species are provided in Fig. If the idiograms in Fig. 2 and the parameters of chromosomes are provided in Table 1. All the karyotypes in this paper are reported for the first time.

Key words: Paris