Japanese wing nut; Pterocarya rhoifolia
A deciduous tree native to Japan, known for its winged nuts. Typically written in katakana in botanical contexts.
The Japanese wing nut is a deciduous tree that grows naturally in wetlands along rivers.
Katakana spelling is common for this plant name; usually written in kana.
Kanji spelling exists but is rarely used; the plant is normally written in kana.
The name サワグルミ (sawagurumi) likely derives from 沢 (sawa, 'marsh') and 胡桃 (kurumi, 'walnut'), referring to its habitat and nut-like fruit. The exact historical derivation is uncertain.