Any of numerous, usually twining vines of the related genera Argyreia, Calystegia, Convolvulus, Merremia, and Ipomoea, having funnel-shaped, variously colored flowers that close late in the day.

• 牵牛花任一种番茄属的植物，通常生有孪生藤，其相关属打碗花属，旋花科和番茄属开有漏斗状的各色花朵，且在一天的晚些时候合上花瓣