noun
rowan; mountain ash
Refers to the tree Sorbus aucuparia, known for its red berries. In Japanese, the katakana name is standard.
セイヨウナナカマドの赤い実が秋に目立つ。
The red berries of the rowan tree stand out in autumn.
ナナカマド is the native Japanese rowan (Sorbus commixta), while セイヨウナナカマド specifically refers to the European rowan (Sorbus aucuparia).
From 西洋 (seiyō, 'Western') + ナナカマド (nanakamado, 'rowan'), referring to the European species.