Abstract: Somatic chromosome numbers of 10 species and 3 varieties in Actinidia Lindl. are reported for the first time, except A. polygama (Sieb. et Zucc.) Maxim. Two ploidy levels, diploid and tetraploid, are found both in A. polygama and A. kolomikta (Maxim. et Rupr.) Maxim. Chromosome numbers are listed as follows: A. kolomikta (Maxim. et Rupr.) Maxim. 2n=58, 116, A. polygama (Sieb. et Zucc. Maxim. 2n=58, 116, A. macrosperma Liang 2n=116, A. callosa var. henryi Maxim. 2n=116, A. callosa var. discoler Liang 2n =116, A. cylindrica Liang 2n=58, A. chrysantha Liang 2n=116, A. sabiaefolia Dunn 2n= 58, A. melliana Hand.-Mazz. 2n=58, A. hemsleyana Dunn 2n=58, A. fulvicoma var. lanata (Hemsl.) Liang 2n=58, A. latifolia (Gardn. et Champ.) Merr. 2n=58, and A. lanceolata Dunn 2n=58.

Key words: Actinidia, Chromosome number.