The fluted trunk of Carpinus caroliniana looks like a flexed muscle, hence the name musclewood.
そのマッスルウッドのひだ状の幹は筋肉のように見え、マッスルウッドという名の由来になった。
A small deciduous North American tree (Carpinus caroliniana) with a fluted, muscle‑like trunk, commonly called musclewood.