Assertion: arnica's flower | /r/ObjectUse | used in preference
Facets:
value: to the rhizome
type: TRANSITIVE-OBJECT
value: to the root
type: TRANSITIVE-OBJECT
Source sentences:
text: All parts of the plant may be used, but the flowers are used in preference to the root.
text: In the North American colonies the flowers are used in preference to the rhizome.