Anatomical Studies on the Wood of Japanese Quercus II. On Subgenus Cyclobalanopsis (Kashi group)
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概要
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Among the Japanese species of genus Quercus, seven representative species of subgenus Cyclobalanopsis, i.e. Q. acuta (Akagashi), Q. gilva (Ichiigashi), Q. myrsinaefolia (Shirakashi), Q. paucidentata (Tsukubanegashi), Q. stenophylla (Urajirogashi), Q. glauca (Arakashi) and Q. Hondai (Hanagagashi) were studied wood anatomically, and: 1. Minute descriptions on the wood anatomical characteristics of each species were given. 2. The processes of the ontogenetic development of the primary broad rays were investigated and it was known that all the species take one and the same process as a principle. 3. The Japanese species of subgenus Cyclobalanopsis are monotypic in wood structure, while the wood of sections ILEX and SUBER of subgenus Lepidobalanus are common with those of subgenus Cyclobalanopsis in their structure, suggesting the near relation of these two sections and subgenus Cyclobalanopsis. 4. The tracheally elements of Q. Hondai are considerably thinner walled. This feature may have some influences upon the wood technological characteristics of this species among the species of this subgenus. 5. A key to the above mentioned seven species based on the wood anatomical characteristics is presented.前報に於て述べた如く日本産カシ属樹種は全てLepidobalanus亜属（ナラ類）とCyclobalanopsis亜属（カシ類）に含まれている。此の中Lepidobalanus亜属については前報においてその木材解剖学的性質を検討したのであるが，本報告においては引続きCyclobalanopsis亜属について検討した。Lepidobalanus亜属が北半球温帯に広く分布し分類学的にも六ツの節（section）に分たれて可成り複雑なグループであるのに対して，Cyclobalanopsis亜属はその分布が東亜及びマレイシヤに限られ分類学的にも比較的単純なグループで前者の如く幾つかの節に分けるという様な事は行われていない。更に此のCyclobalanopsis亜属は1886年にOERSTEDTによつてQuercus属から分離され独立のCyclobalanopsis属として取扱われており，之は現在大部分の日本の分類学者によつて認められている。然しながら筆者は後に述べる理由によCyclobalanopsisを亜属として取扱つた。
- 東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forests,Institute of Forest Botany, Division of Forestry, Faculty of Agriculture, University of Tokyoの論文
東京大学大学院農学生命科学研究科附属演習林,The Tokyo University Forests,Institute of Forest Botany, Division of Forestry, Faculty of Agriculture, University of Tokyo | 論文
- Anatomical Studies on the Wood of Japanese Quercus II. On Subgenus Cyclobalanopsis (Kashi group)
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