Journaling reads:
Buttercups are a large genus of flowering plants called Ranunculus. It has yellow, shiny petals, and grows wild in many places. It is poisonous to eat for humans and cattle, but when dry the poison is not active.
People sometimes hold a fresh buttercup flower under the chin of a friend or family member. If a yellow reflection from the flower's shiny petals can be seen under the chin, the person is said to "like butter". This custom is still taught to young children and shows how buttercup petals reflect light.