艸 +13 = 17

蕹ㄩㄥyōng

ㄩㄥyōng
  1. 植物名。旋花科牽牛屬，「蕹菜」、「空心菜」之古稱，參見「空心菜」條。
英water spinach or ong choy (Ipomoea aquatica)​, used as a vegetable in south China and southeast Asia, Taiwan pr. [yong1]
德Wasserspinat (S, Bio)​