Abstract
Cytological investigations on myco-heterotrophic orchid of Gastrodia javanica (Blume) Lindl. were carried out. The chromosome number of 2n=36 was counted here for the first time. The chromosome complement at resting stage showed the intermediate type between the simple chromocenter type and the complex chromocenter type. The metaphase chromosomes showed a bimodal karyotype in length consisted with four large chromosomes varied from 2.0-1.7 μm and 32 small chromosomes varied from 1.4-0.8 μm. The chromosome number of 2n=36 was equal to 2n=36=18II in G. elata Blume and n=18 in G. angusta S. Chow & S. C. Chen, and it differed from 2n=22 in G. confusa Honda & Tuyama and G. pubilabiata Sawa.
