Commelina communis, commonly known as the Asiatic dayflower, is an herbaceous annual plant in the dayflower family. It gets its name because the blooms last for only one day. It is native throughout much of East Asia and northern parts of Southeast Asia. In China, the plant is known as yazhicao (simplified Chinese: ้ธญ่ท่; traditional Chinese: ้ดจ่ท่; pinyin: yฤzhฤซcวo), roughly translating to “duckfoot herb”, while in Japan it is known as tsuyukusa