1946 年 59 巻 697-702 号 p. 96-98
The formation of proembryo in Taxus Wallichidana, Zuccarini is described. The wall-formation of the proembryo takes place after the fourth nuclear division. Sixteen cells of the proembryo are arranged in two tiers. Then the fifth division occurs. In this division the absolute synchronism of mitoses is not maintained. The haploid chromosome number was determined to be twelve in the mitoses of the body cell and in the cells of the female gametophyte.