different between toadflax vs flaxweed

English

Wikispecies

toad +? flax

toadflax (countable and uncountable, plural toadflaxes)

Any of several European plants, of the genus Linaria, having two-lipped yellow flowers.
- 2010, Clare Vanderpool, Moon Over Manifest
  One morning she had me traipsing out at the crack of dawn for prickly poppy, toadflax, spiderwort, and skeleton weed. If that doesn't sound like the makings of a witch's brew, then I'm the queen of England.
Any of several other plants in the family Plantaginaceae.

flax +? weed

flaxweed (usually uncountable, plural flaxweeds)

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