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.
Osmunda banksiifolia is a fern that grows in moist mountainous areas.
Katakana spelling is standard for this fern species name.
Kanji spelling is rare and may not be widely recognized; the plant is usually written in kana.
The name likely derives from 城山 (Shiroyama, a place name) + 薇 (zenmai, a type of fern), but the exact origin is uncertain.