tropaeolum: a tropical American genus of dicotyledonous climbing or diffuse pungent herbs constituting the family Tropaeolaceae
rosid dicot genus: a genus of dicotyledonous plants
acquired immunity: immunity to a particular disease that is not innate but has been acquired during life; immunity can be acquired by the development of antibodies after an attack of an infectious disease or by a pregnant mother passing antibodies through the placenta to a fetus or by vaccination