セイタカアワダチソウは、花もそうですが、特に白い綿毛を持つ実が泡立っているかのように見えます。
余談ですがこの草には、水と混ぜると石鹸のように泡が立つサポニンが、根や茎、葉に含まれています。
The Japanese name for "tall Goldenrod" means tall and foaming grass. The flowers and especially the fruits with white fluff, appear to be foaming.
As an aside, the roots, stems, and leaves of this plant contain saponin, which creates soap-like foams when mixed with water.
余談ですがこの草には、水と混ぜると石鹸のように泡が立つサポニンが、根や茎、葉に含まれています。
The Japanese name for "tall Goldenrod" means tall and foaming grass. The flowers and especially the fruits with white fluff, appear to be foaming.
As an aside, the roots, stems, and leaves of this plant contain saponin, which creates soap-like foams when mixed with water.