false bugbane

...It is distributed from central Honshu northwards, Hokkaido, the southern Kuril Islands, Sakhalin, the Ussuri region, and the Okhotsk region. Those that grow in the southern part of the distribution area have no hairs on the leaves, but those that grow in the northern part have hairs on the undersides of the leaves and are called Okumomijikaramatsu var. borealis Hara. There are two other species in this genus, one each in eastern and western North America (English name false bugbane), but it is difficult to clearly distinguish these three species from each other, and some believe they should be included in the same species. [Michio Tamura]...

*Some of the terminology that refers to "false bugbane" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…本州中部以北，北海道，南千島，サハリン，ウスリー地方，オホーツク地方に分布し，分布域の南方に生じるものは葉に毛がないが，北方に生えるものは葉の裏に毛があり，オクモミジカラマツvar.borealis Haraという。本属には他に北アメリカ東部と西部に1種ずつ産する(英名false bugbane)が，これら3種を互いにはっきりと区別することは難しく，同種に含める見解もある。【田村 道夫】。…

※「false bugbane」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