lizard's tail vs swamp lily

lizard's tail

noun
  • Used other than figuratively or idiomatically: see lizard, tail. 

  • Houttuynia cordata, chameleon plant, a herbaceous perennial plant native to Japan, Korea, southern China and Southeast Asia. 

  • Crassula muscosa, rattail crassula, a succulent plant native to South Africa 

  • Saururus cernuus, a medicinal and ornamental plant native to eastern North America. 

swamp lily

noun
  • Saururus spp. (lizard's tail) 

  • Ottelia ovalifolia 

  • Zephyranthes atamasco (rain lily, Atamasco lily) 

  • Any of various species of lily growing in wet habitats. 

  • Some species of Crinum, including Crinum americanum (southern swamplily), Crinum erubescens, Crinum pedunculatum (also river lily or mangrove lily) 

  • Lilium superbum (also Turk's cap lily, turban lily, lily royal, or American tiger lily) 

How often have the words lizard's tail and swamp lily occurred in a corpus of books? (source: Google Ngram Viewer )