Abstract
1. Carices of this region are much more connected to the outer regions through Saghalien than the Kurile Isls..2. The Kurile Isis. may be divided into three districts on the phytogeographical point of view.3. Some Saghalien species are found in south-eastern Hokkaido or Isl. Shikotan, and the species existing in Honshiu are partly found only in the central to eastern Hokkaido.4. La Perouse Strait and Tsugaru Strait divide the distributions, but not so evidently.5. Quelpaert are more closely related to Japan than the Korean peninsula.6. Some species grow in Central China, (Southern Korea) and Japan.7. Utricles float for a long time, showing the most important factor for the distribution, and the sea currents are useful for this purpose.8. The distributions have much references along with the climatic and edaphic conditions since Tertiary period, and also width of habitats in respective species.9. Some Australian species resemble those of this region, and the endemic species in the small islands show remarkable features. These facts suggest us the formation of the new species of Carices rather in short times.
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