Abstract: The present work reports the chromosome numbers of 30 species of 7 genera of Magnoliaceae in China. The chromosome numbers of Liridendron chinense, Magnolia officinalis, M. liliflora, Michelia rigo and M. champaca are consistent with those previously reported Magnolia denudata was reported 2n=114, but our result shows 2n= 76; M. grandiflora was reported 2n=112, 114, but here 2n=114. Chromosome numbers of the other 23 species are reported for the first time. Vouchers for experimental materials have been preserved in Herbarium of the Department of Biology, Nankai University, Tianjin.

Key words: Chromosome number, Magnoliaceae.