A numerical taxonomic study of silene and melandrium are presented.For the sake of analyzing the resemblances between the 21 species or OTU's selected at random from the Silene and melandrium

there are 13 OTU's in Silene and 8 OTU's in Melandrium.A summation of 35 characters was em- ploged in the numerical analyses.Raw data for each character were given equal weighting by condensa- tion in order to have adequate comparisons

and the characters were converted to 11 states.The charac- ters used in this study largely morphological

and some morphology of pollen.The estimation of the dis- tans coefficent and correlation coefficient between each pair or OTU's was estabished.The clustering technique used was unweighted pair-group method using arithmetic averages (UPGMA). According to the results

all OTU's are mainly divided into 2 sets:A and B(Fig.1＆Fig.2). The A is Silene

the B in Melandrium the combining level of this two groups is very low.The results are the same as the results of morphological classification.For this reason

Silene and Melandrium ought to exist on one's own.In this paper

the problem of taxonomical grade under genus discussed.