1935 年 49 巻 584 号 p. 546-551
1. The anatomical characteristics of the leaves of six species belonging to Sect. Atratae are described in the present paper.
2. The shapes of hinge cells are most peculiar in Carex Meyeriana and C. Augustinowiczii. Spine cells are always found in the margins except those of C. atrata, also in the upper epidermis in C. Meyeriana and C. Augustinowiczii. Stomata in the upper epidermis are found only in C. Gmelini. Protuberances are numerous in the under epidermis of these species, excepting C. Gmelini. Transfusion cells are evident in C. Meyeriana.
3. Those six species can be divided into three groups according to the characters of the leaves; i.e. C. Meyeriana and C. Augustinowiczii in the first, C. Gmelini in the second and the other three species in the third group.