Title Oaks and Acorns of Aso

  • Kumamoto
  • Oita
Topic(s):
$SETTINGS_DB.genreMap.get($item) National Parks/Quasi-National Parks
Medium/Media of Use:
Interpretive Sign
Text Length:
≤250 Words
FY Prepared:
2018
Associated Tourism Board:
Aso-Kuju National Park

阿蘇の木とドングリ


ドングリは、樫の木とその近縁種(ブナ科コナラ属やマテバシイ属)の実である。通常は、硬い殻で囲まれた1つまたは2つの種子を含み、皿のような殻斗に入っています。


木の種類によって、ドングリの形に違いがあります。また、ドングリ形や殻斗の形にも、木の種類によって様々な種類があります。阿蘇に多様な樹木が生えており、それぞれ独特の形をした実を持っています。


ミズナラ、コナラ、シラカシ、イチイガシ、アカガシなどの場合、ドングリの一部だけ殻斗に覆われています。


一方、クヌギやカシワの場合、殻斗が大きく、ドングリの大部分を覆っています。

Oaks and Acorns of Aso


The acorn, or oak nut, is the fruit of oaks and their close relatives (genera Quercus and Lithocarpus, in the family Fagaceae). They usually form singly or in pairs, and are enclosed in a tough, leathery shell carried in a cup-shaped cupule.


The shape of the acorn will depend to some extent on the particular species of tree. The shape and appearance of the shell that surrounds the acorn also vary considerably, again depending on the type of tree. In Aso there are a number of different acorn-producing trees, each bearing their own unique acorn.


The Japanese oak (Quercus mongolica ssp. crispula), Konara oak (Quercus serrata), Shirakashi (Quercus myrsinaefolia), Ichiigashi (Quercus gilva), and Japanese evergreen oak (Quercus acuta), are all examples of trees that produce acorns with relatively small cupules that cover only a small portion of the acorn itself.


Japanese chestnut oak (Quercus acutissima) and Daimyo oak (Quercus dentata) trees, on the other hand, produce acorns with large, prominent cupules that cover most of the nut.

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