%A LI Lin-Chu %T THE KARYOTYPE ANALYSIS OF TSUGA LONGIBRACTEATA AND ITS TAXONOMIC SIGNIFICANCE %0 Journal Article %D 1991 %J Plant Diversity %R %P 1-3 %V 13 %N 03 %U {https://journal.kib.ac.cn/CN/abstract/article_31474.shtml} %8 1991-06-25 %X The present paper deals with the karyotype analysis of Tsuga longibracteata Cheng endemic to China, which is a represent species of subgen. Paleotsuga, for the first time. The somatic chromosomes in root -tip cells of the plant are found to be 2n=24, all with median and submedian constrictions. The 12th chromosome of the karyotype has a long centromere region.