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４种三尖杉科植物的核形态结构的研究结果如下：它们的间期核均为复杂染色中心型，分裂前期染色体属于中间型，体细胞分裂中期染色体的核型为：（１）三尖杉ＣｅｐｈａｌｏｔａｘｕｓｆｏｒｔｕｎｅｉＨｏｏｋ．ｆ．，Ｋ２ｎ＝２４＝２１ｍ＋１Ｍ＋２ｓｍ（２ＳＡＴ），核型不对称性属于２Ａ型，着丝点端化值（ＴＣ％）为５３９９；（２）高山三尖杉Ｃ．ａｌｐｉｎａ（Ｌｉ）Ｌ．Ｋ．Ｆｕ，Ｋ２ｎ＝２４＝１９ｍ＋３Ｍ＋２ｓｍ（２ＳＡＴ），核型不对称性属于２Ａ型，ＴＣ％值为５３９３；（３）海南粗榧（西双版纳粗榧）Ｃ．ｍａｎｎｉＨｏｏｋ．ｆ．，Ｋ２ｎ＝２４＝２２ｍ（１ＳＡＴ）＋２ｓｍ（２ＳＡＴ），核型不对称性属于２Ａ型，ＴＣ％值为５４４７；（４）篦子三尖杉Ｃ．ｏｌｉｖｅｒｉＭａｓｔ．，Ｋ２ｎ＝２４＝２２ｍ＋２ｓｍ（２ＳＡＴ），核型不对称性属于２Ｂ型，ＴＣ％值为５３５３。４种三尖杉的染色体结构都是１～２２号染色体为ｍ染色体，２３和２４号染色体为ｓｍ染色体并具随体，其随体较大而稳定。它们的核形态结构较为相似，从核型参数上看似乎三尖杉和高山三尖杉的亲缘关系最近，种间的中期染色体结构也有一些细微差异。除三尖杉Ｃ．ｆｏｒｔｕｎｅｉ?
The results of the nuclear morphological structures of the four species of Cephalotaxus are as follows: Their interphase nuclei are all complex centromere types, and the chromosomes at the pre-schizophrenic stage are of intermediate type. The karyotypes of metaphase chromosomes of somatic cell division are: (1) Cephalotaxus fortuneiHook. f. , K2n = 24 = 21m + 1M + 2sm (2SAT). The karyotype asymmetry belongs to type 2A, and the centromere value (TC%) is 5399. alpina (Li) L. K. Fu, K2n = 24 = 19m + 3M +2 sm (2SAT). The karyotype asymmetry belongs to type 2A and the TC% value is 5393. (3) manniHook. f. , K2n = 24 = 22m (1SAT) + 2sm (2SAT), karyotype asymmetry belongs to type 2A, T C % value of 54 47; oliveriMast. , K2n = 24 = 22m + 2sm (2SAT). The asymmetry of karyotypes belonged to type 2B, and the percentage of TC 5353.4. The chromosome structures of Cephalotaxus were all chromosomes 1 to 22, And chromosome 24 chromosome sm with a body, with the larger and stable with the body. Their nuclear morphological structure is similar, from the karyotype parameter seems Cephalotaxus and Alpine Cephalotaxis the closest genetic relationship between the interim chromosome structure also has some minor differences. In addition to Cephalotaxus C. fortunei?