spruce tree; Ezo spruce
Refers to spruce trees, especially the variety Picea jezoensis hondoensis (Ezo spruce). Typically written in katakana.
Many spruce trees grow in the forests of Hokkaido.
Katakana spelling is common for this tree name; usually written in kana.
Kanji form is rare and may not be widely recognized; learners will encounter the katakana form almost exclusively.
The reading とうひ is likely derived from Chinese; the kanji 唐 (Tang/China) and 檜 (cypress) suggest a Chinese connection, but the exact derivation is uncertain.