noun
Japanese madder (Pseudopyxis depressa)
A small perennial plant native to Japan, with white flowers. The name is often written in katakana.
イナモリソウは山地の湿った場所に生える。
Japanese madder grows in moist mountainous areas.
春になると、イナモリソウの白い花が咲く。
In spring, the white flowers of Japanese madder bloom.
The name likely derives from the place name 稲森 (Inamori) and 草 (sō, 'grass'), but the exact origin is uncertain.