noun
multiflora rose; baby rose; Japanese rose
A species of wild rose native to East Asia, often seen in hedges and thickets. The katakana form ノイバラ is the most common written form.
ノイバラの白い花が咲いている。
The white flowers of the multiflora rose are blooming.
この生け垣はノイバラでできて
This hedge is made of multiflora roses.
薔薇 is the general term for roses, while ノイバラ specifically refers to the wild multiflora rose species.
Compound of 野 (no, 'field, wild') + 茨/薔薇 (ibara, 'thorny plant, rose'). The reading いばら is a rendaku form of うばら, an old word for thorny shrubs.