Red rose

Henry the Sixth, Part III, [5.1.81-88]. Clarence. “Father of Warwick, know you what this means?” [Stage direction: Takes his red rose out of his hat and throws it at Warwick.] “Look here, I throw my infamy at thee,/ I will not ruinate my father’s house,/ Who gave his blood to lime the stones together,/ And set up Lancaster. Why, trowest thou, Warwick,/ That Clarence is so harsh, so blunt, unnatural,/ To bend the fatal instruments of war/ Against his brother and his lawful king?”