Cathaya

...Pine subfamily Pines (genus Pinus ) have long and short branches with scale leaves on the former and needles on the latter, Larix (genus Larix , genus Pseudolarix , genus Cedrus ) have needles on the long branches as well, and Abies (genus Abies , genus Tsuga , genus Picea , genus Pseudotsuga , genus Keteleeria ) have no short branches. The genus Cathaya in Sichuan Province, China is similar to Pseudotsuga, but it has both short and long branches, making it difficult to determine which genus it belongs to. Many tree species are important for forestry, such as red pine, Yezo spruce, Abies sachalinensis, and larch, but as natural forests, they also form major landscapes in the lowlands (red pine), low mountain zone (fir, hemlock), and subalpine zone (fir white, hemlock).

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…長枝と短枝があり，前者に鱗片葉，後者に針葉をつけるマツ亜科(マツ属Pinus)，長枝にも針葉がつくカラマツ亜科(カラマツ属Larix，イヌカラマツ属Pseudolarix，ヒマラヤスギ属Cedrus)，および短枝のないモミ亜科(モミ属Abies，ツガ属Tsuga，トウヒ属Picea，トガサワラ属Pseudotsuga，ユサン属Keteleeria)の3亜科に分類される。中国四川省にあるカタヤ属Cathayaはトガサワラ属に似るが，短枝と長枝があり，所属を決めがたい。アカマツ，エゾマツ，トドマツ，カラマツなど林業上重要な樹種が多いが，自然林としても，低地(アカマツ)，低山帯(モミ，ツガ)，亜高山帯(シラビソ，コメツガ)で主要な景観をつくっている。…

※「Cathaya」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