Assertion: truffle | /r/RelatedTo | the roots of trees
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: They are saprophytes, usually associated with the roots of trees, possibly in a mutually beneficial association (see mycorrhiza).
text: Truffles are associated with the roots of trees—primarily oaks and hazelnuts in the case of the Italian white and Périgord black; Douglas firs in the case of Oregon white truffles (T. oregonense and T. gibvbosum).