policeman's helmet

名词 n.
中文释义

英文释义

名词 n.
  1. The invasive plant Impatiens glandulifera, native to the Himalayas. UK,uncountable
    — Of the nonnative species, only the policeman's helmet (I. glandulifera) has a similar floral structure, though its flowers are normally purple to blue and occasionally white; its leaves and stems can be used similarly to our native species.
  2. Used other than figuratively or idiomatically: see policeman, helmet.

词源

From the shape of the flower.
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