Fisetin is found in Eudicotyledons (flowering plants mainly characterized by having two seed leaves upon germination) as well as fruits and vegetables.
It is also found in many fruits and vegetables, such as strawberries, apples, persimmons, onions and cucumbers. It is found in Eudicotyledons, such as trees and shrubs in the family Fabaceae, such as the acacias Acacia greggii and Acacia berlandieri, the parrot tree (Butea frondosa), the honey locust (Gleditsia triacanthos), members of the family Anacardiaceae such as the Quebracho colorado and species of the genus Rhus, which contains the sumacs. The eudicots, Eudicotidae or eudicotyledons are a clade of flowering plants mainly characterized by having two seed leaves upon germination. 
