Hard pine (English spelling)

…The distinction between sapwood and heartwood and the annual ring boundaries are clear. Because the wood is hard and contains a lot of resin, it is also called hard pine (pitch pine). The number of species is as follows: 4 species of pine and 3 species of pitch pine in Japan, 12-13 species of each in Asia, 2 species of pine and 10 species of pitch pine in Europe, 20 species of pine and 40-45 species of pitch pine in North America. …

*Some of the terminology that mentions "hard pine" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…辺材，心材の区別および年輪界が明らかである。材質が硬く樹脂分が多いので硬松類hard pine(pitch pine)ともいう。種数の配分は，日本に五葉松類4種，二葉松類3種，これらを含んでアジアに両類とも12～13種ずつ，ヨーロッパに五葉松類2種，二葉松類10種，北アメリカに五葉松類20種，二葉松類40～45種。…

※「hard pine」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報