Chromosome number of some monocot species from Ton-Nga-Chang Wildlife Sanctuary, southern Thailand

Abstract

Chromosome counts in the root tip cells of 22 species belonging to 12 genera of Araceae, Commelinaceae. Costaceae and Zingiberaceae from Ton-Nga-Chang Southern Thailand were determined by the Feulgen Squash method. Chromosome numbers of Alpinia conchigera Griff. (2n=48), Amischotolype
marginata Hassk. (2n=36). Amomum biflorum Jack. (2n=48), Aneilema conspicuum (Blume) Kunth (2n=28), Commelina cf paleata Hassk. (2n=60), and Homalomena cf. humilis (Jack) Hook.f. (2n=78), are reported for the first time. The species. Amomum aculeatum Roxb. (2n=52), Costus speciosus (A.Koenig) Sm.(2n=20) and Etlingera littolaris (A.Koenig) Giseke (2n=50) are different from earlier reports.