Assertion: periwinkle's leaf | /r/HasProperty | harvested
Facets:
value: mechanically
type: MANNER
Source sentences:
text: Concerns about the political situation in Madagascar and in India led Lilly to buy from newly established periwinkle plantations in Texas, where the leaves were harvested mechanically.
text: The leaves are harvested when the plant is flowering, and can be dried for later use[ 238 ].