Alnus firma (species of alder)
A species of alder native to Japan, often used in land reclamation and as a pioneer species. The name is usually written in katakana.
Alnus firma grows well even in poor soil.
Standard katakana spelling for this plant name; usually written in kana.
Kanji spelling is rare and mainly used in botanical contexts; usually written in kana.
The name ヤシャブシ is of Japanese origin, but the exact derivation is uncertain. The kanji 夜叉五倍子 is an ateji spelling, likely chosen for phonetic reasons rather than meaning.