Flapper
It is 7-15cm in height in the south of Gyeonggi province, in the field or on the gutters. There is no hair on the whole, and the stem is divided from the bottom by branches. Leaves are opposite, long elliptical, 1.5-3cm long, 5-12mm wide, dull end, flat margin, petiole free, 3-5 parallel veins. The flower is pale reddish-purple, with one each on the axil and the peduncle is long. Calyx is 3-4㎜ long, 5 deeply branched, and the branch is lanceolate. The corolla is 6㎜ long, and the end of the tube is lips. Fruits are capsule, oval, and occlusion.