Where did the term plantagenet come from?

The term "Plantagenet" originates from the Latin phrase "planta genista," which means "broom plant," a flowering shrub. It was originally a nickname for Geoffrey Plantagenet, Count of Anjou, who wore a sprig of the broom plant in his hat. The name came to represent the royal dynasty that ruled England from the 12th to the 15th centuries, beginning with King Henry II. The Plantagenets are known for their significant impact on English history, including the development of the common law system and the conflicts of the Wars of the Roses.