expression, noun
Refers to the woody vine that produces grapes. A straightforward compound of ぶどう (grape) and 木 (tree/wood).
庭にぶどうの木を植えた。
I planted a grapevine in the garden.
ぶどう refers to the fruit (grapes), while ぶどうの木 refers specifically to the vine or plant.
Compound of ぶどう (grape) + の (possessive particle) + 木 (tree/wood). Literally 'grape tree'.