noun
Yezo spruce; Jezo spruce
A species of spruce native to Northeast Asia, including Hokkaido. Scientific name: Picea jezoensis.
北海道の森にはエゾマツがたくさん生えている。
Many Yezo spruces grow in the forests of Hokkaido.
From 蝦夷 (Ezo, old name for Hokkaido) + 松 (matsu, pine). The exact derivation is straightforward; the tree is associated with the region.