RichThesaurus
shepherd's needle
vs
tickseed sunflower
shepherd's needle
noun
Beggarticks (Bidens spp.)
Venus' comb (Scandix pecten-veneris)
tickseed sunflower
How often have the words
shepherd's needle
and
tickseed sunflower
occurred in a corpus of books?
(source:
Google Ngram Viewer
)