Anatomical characteristics of the leaves of Carex aequialta, C. aphyllopus and C. caespitosa are described in this paper; the remarkable points of the characteristics are as below: Carex aequialta KÜKENTHAL: Upper epidermal cells and the cells in the margins are large and thick-walled. Stomata are small and have protruded subsidiary cells. Transfusion cells are conspicuous. Protuberanceshardly occur in the epidermis. Carex aphyllopus KÜKENTHAL: Spine cells are found in the upper epidermis on the large nerves, margins and the under epidermis on the midrib. Protuberances occur in the upper epidermis sparsely, and almost all the cells in the under epidermis. Hinge cells have thin and wavy cell walls. Somata are small and have protruded subsidiary cells. Carex caespitosa L.: Hinge cells are in many rows and in two or more layers. All epidermal cells, excepting in the margins, are thin-walled. Protuberances occur mostly in the under epidermis. All vascular bundles are of almost equal size. Transfusion cells are conspicuous.
1. Iris japonica, an allotriploid plant (YASUI, 1939), produced some capsules as a rare case in the next year of the transplantation; but in the subsequent years those stocks bore no capsule. 2. The ratio of the number of the riped capsules to that of the flowers is 0.008%(Table 1). This ratio is remarkably small when. compared with the calculated ratio induced from the number of the viable pollen grains and that of the embryo sac with normal structure. The causes of a high sterility in this plant were discussed, and the vigorous vegetative development of the stolones is considered as an important cause.
In Sargassum enerve and Sargassum Harneri, the initial cell of the onceptascle divides at first by a curved wall into two cells, the upper one being the so-called tongue cell. The lower cell repeats longitudinal division and forms the wall-cells lining the cavity of the conceptacle. Later the tongue cell becomes free from the wall of the conceptacle and is transferred to the mouth of the conceptacle to close up its opening.