Abstract: In the present paper, karyological studies were carried out in five species of Subgen. Palladia ( Lysimachia) from China, of which the chromosome numbers and the karyotypes of the four species are first re-ported, which are: Lysimachia glanduliflora Hanelt 2n = 24 = 12m + 8sm + 4st(2SAT), Lysimachia heteroge-nea Klatt 2n = 22 = 2m + 4sm + 6st + lOt, Lysimachia Candida Lindl. 2n = 24 = 14m + 6sm(2SAT) + 4at and Lysimachia parvifolia Franch. 2n = 48 = 34m + lOsm + 4st. The karyotype of Lysimachia fortunei Maxim from Jiujiang of China (2n = 24 = 20m + 4sm(2SAT) ) is somewhat different from that from Japan (2n = 24 = 18m (1SAT) + 6sm(SAT)) . The four sections with nine species in the Subgen. Palladia ( Lysimachia) were also cytologically analysed in the paper. The result shows that in the four sections, Sect. Spicatae has the most sym-metrical karyotype. Sect. Lubinia has the most asymmetrical karyotype ,and Sect.Candidae is between the fomer two sections, but Sect. Miltandrae has various kinds of the karyotypes including the former three sections.

Key words: Lysimachia, Karyotype