Grubbiaceae is a family of flowering plants endemic to the Cape floristic region of South Africa. The family includes five species of leathery-leaved shrubs in two genera Grubbia and Strobilocarpus. They are commonly known as sillyberry. Given a list of categories: company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, what category does the paragraph belong to?
Plant