inkberry vs red nightshade

inkberry

noun
  • Any plant of the genus Phytolacca, especially Phytolacca americana, the pokeweed. 

  • Ilex verticillata, American winterberry 

  • Scaevola plumieri, a fan flower 

  • Ilex glabra (winterberry, gallberry) 

red nightshade

noun
  • Phytolacca americana syn. Phytolacca decandra 

  • Solanum villosum 

How often have the words inkberry and red nightshade occurred in a corpus of books? (source: Google Ngram Viewer )