1. The haploid chromosome number of Torreya nucifera is eleven. 2. Fertilization occurs in the middle of August. After fertilization 3 simultaneous nuclear divisions occur. Cell wall formation begins at the 8 nucleus stage. The proembryo is formed in the basal part of the egg cell. 3. Usually four embryonic initials are formed at the end of the prosuspensor. These cells develop separately. Rosette embryo is very common.
The author studied on the fertility of the stored Lilium pollen and obtained good results by using the Glycerine as desicative and under cool keeping. By using these stored pollen the author succeeded crosses betweenseveral species, which have remarkable different flower season. In L. speciosum×L. auratum there occured abnormal seed formation. This seed has no power to germinate but when its embryo cultured with sugar solutions, it develops gradually to normal young plant. This plant flowered after three years and showed the identical flower-type with a famous hybrid ×Lilium Parkmannii, of which history WILSON states in his work “The Lilies of eastern Asia”.
1. Macrosporogenesis and the formation of the embryo-sac of Reineckia carnea KUNTH are described. 2. The heterotypic metaphase of the embryo-sac mother cell shows 19 bivalent chromosomes. 3. Of the four cells (tetrad) resulted from the meiosis of macrosporocytes only one remains as megaspore, the other three disintegrating. 4. Three mitoses of the embryo-sac nucleus give rise to a octonuclear embryo-sac of normal type. 5. The seeds of this plant are capable of germination. The partial sterility seems not due to the anomaly of meiosis, but to be nutrive nature.