noun
Osmunda banksiifolia (species of fern)
A species of fern native to East Asia. The name is usually written in katakana as シロヤマゼンマイ.
シロヤマゼンマイは山地の湿った場所に生えるシダ植物です。
Osmunda banksiifolia is a fern that grows in moist mountainous areas.
ゼンマイ (Osmunda japonica) is a related fern species commonly eaten in Japan, while シロヤマゼンマイ is not typically consumed.
The name likely derives from 城山 (Shiroyama, a place name) + 薇 (zenmai, a type of fern), but the exact origin is uncertain.