Raven looked down into a book and noticed a paragraph on it. She raised her hand and stated the words that she had taken in. "Buckthorn is indigenous to Europe, and has been observed in this country as an introduced plant. It flowers from April to July, and matures its fruit about the middle of autumn. The parts used are the berries; they are globular, 3 or 4 lines in diameter, slightly compressed at the apex, black, glossy, and inclose a green pulp in which the seeds are imbedded. The juice becomes gradually red, owing to the development of acetic acid, and may be preserved long unchanged in the form of a syrup." She finished and smiled. She was surprised to know she remember it.