1. The leaves of
Carex kiotensis, C. phaeopoda and
C. flabellata have fibre cells without the vascular bundles directly on the inner side of the under epidermis, this characteristic is the most peculiar, and in this point these species may be grouped together.
2. In addition to the above mentioned characteristic these species have many similarities, viz., hinge cells are in two layers (or obscurely in three layers), upper epidermal cells are thick-walled and the transfusion cells are very numerous, etc. Spine cells are widely distributed in the upper epidermis in
C. kiotensis and
C. flabellata, and rather scarce in
C. phaeopoda. C. flabellata has sphericalp rotuberances widely distributed in the under epidermal cells and protruded subsidiary cells in the stomata.
3. An analytical key to these three species in respect to the leaf-structures is shown as below:
1{Spherical protuberances never existing (excepting in the under epidermal cells on the midrib) in the under epidermis ……2 Spherical protuberances existing in almost all the cells in the under epidermis ……
C. flabellata.
2{Spine cells rather many in the upper epidermis. No protuberance to be found in the epidermis in the under side of the midrib ……
C. kiotensis. Spine cells rather scarce in the upper epidermis. Protuberances occurring in the under epidermal cells on the midrib ……
C. phaeopoda.
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