Asian-spiderwort

Murdannia keisak is an annual plant with alternate leaves and prostrate stems that root at the lower nodes. It produces three-petaled flowers in white to bluish-purple or pink, found in the upper leaf axils and at the ends of stems. The plant grows in freshwater marshes, along the edges of ponds, and in rice-growing areas of East Asia. It is native to China, Japan, Korea, and Tibet, and has been documented in various regions including the United States, Italy, and parts of Southeast Asia. The species was first described in 1936.