Assertion: common comfrey | /r/HasProperty | s. officinale
Facets:
Source sentences:
text: Common comfrey (S. officinale) produces white or pink flowers and is likely insect pollinated.
text: Since a chemical in isolation behaves differently than when present in a whole plant, rats are different than humans, and it is unclear whether common comfrey (S. officinale) or Russian comfrey (S. uplandicum) was used, there is dissension among herbalists regarding this decision and whether comfrey is indeed toxic.