dandelion vs sow thistle

dandelion

noun
  • Any of the several species of plant in the genus Taraxacum, characterised by yellow flower heads and notched, broad-ended leaves, especially the common dandelion (Taraxacum officinale). 

  • A yellow colour, like that of the flower. 

  • The flower head or fruiting head of the dandelion plant. 

adj
  • Of a yellow colour, like that of the flower. 

sow thistle

noun
  • Any of the thistles in one of the genera Cicerbita and Sonchus. 

How often have the words dandelion and sow thistle occurred in a corpus of books? (source: Google Ngram Viewer )