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black horehound

British  

noun

  1. a hairy unpleasant-smelling chiefly Mediterranean plant, Ballota nigra , having clusters of purple flowers: family Lamiaceae (labiates)

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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It feeds throughout the winter on the roots of numerous plants, including the dock, dandelion, burdock, white dead nettle, black horehound, and the hop.

From Project Gutenberg