Abstract: Six species of Cymbidium, all cultivated plants of Chinese origin, are karyologically analyzed: Cymbidium suavissimum Sander ex C.Curtis(2n=40=30+10sm), C.lowianum (Rchb.f.)Rchb.f.(2n=40=26m+12sm+2st), C.wenshanense Y.S.Wu et F.Y.Liu. (2n=40=28m+10sm+2st), C.hookerianum Rchb.f.(2n=40=30m+8sm+2st), C.eburneum Lindl. (2n=40=36m+4sm)and C.elegans Lindl.(2n=40=28m+8sm+4st). Based on karyotypical data the phylogenetic relationships between the data treated are discussed.

Key words: Cymbidium

摘要： 首次研究了6种国产兰属植物的染色体形态和核型。果香兰(Cymbidium suavissimum)核型为2n=40=30m+10sm；碧玉兰(C.lowianum)为2n=40=26m+12sm+2st；文山红柱兰(C.wenshanense)为2n=40=28m+10sm+2st；虎头兰(C.hookerianum)为2n=40=30m+8sm+2st；独占春(C.eburneum)为2n=40=36m+4sm；莎草兰(C.elegans)为2n=40=28m+8sm+4st。结合形态学特征和已有的核型资料，对兰属植物的核型进化进行了初步的讨论。

关键词: 兰属, 核型, 核型进化