n.annual aromatic weed of Pacific coastal areas (United States and northeastern Asia) having bristle-pointed leaves and rayless yellow flowers
同义词：rayless chamomileMatricaria matricarioides
英汉双解大词典
pineapple weed
1.
N（名词）
an Asian plant, Matricaria matricarioides, naturalized in Europe and North America, having greenish-yellow flower heads, and smelling of pineapple when crushed: family Asteraceae (composites) 香甘菊