Pseudotsuga

...The family Pinaceae consists of 10 genera and 220 species, distributed mainly in the temperate zone of the Northern Hemisphere (Figure). It is divided into three subfamilies: the subfamily Pinus ( Pinus genus), which has long and short branches with scale leaves on the former and needles on the latter; the subfamily Larix ( Larix genus, Pseudolarix genus, Cedrus genus), which has needles on long branches; and the subfamily Abies ( Abies genus, Tsuga genus, Picea genus, Pseudotsuga genus, Keteleeria genus), which has no short branches. The genus Cathaya in Sichuan Province, China, is similar to the genus Pseudotsuga, but it has both short and long branches, making it difficult to determine its affiliation. ...

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

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…マツ科は10属220種が北半球のおもに温帯に分布する(図)。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。…

※「Pseudotsuga」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