noun
plume poppy; tree celandine
A tall perennial plant (Macleaya cordata) with large lobed leaves and plume-like flower clusters, native to East Asia.
タケニグサは道端でよく見かける大きな多年草です。
Plume poppy is a large perennial plant often seen along roadsides.
タケニグサの白い花が風に揺れていた。
The white flowers of the plume poppy were swaying in the wind.
The name likely derives from the plant's hollow, bamboo-like stem (竹, take) and its resemblance to 似草 (nigusa, 'resembling plant') or its use in boiling (煮, ni). The exact origin is uncertain.