Purple morning glory (Ipomoea purpurea) belongs to the Convolvulaceae (the Bindweed family). It is a perennial herb that is native to Mexico and Central America. It was introduced into Japan in the early Edo Era (about 380 years ago). This herb entwines itself around adjascent shrubs, and can reach 2-3 m in height. The stems are covered with brown hairs and the leaves are cordate. The flowers are funnel-shaped, blue to purple or white, 5-6 cm across, and continue to bloom from summer to late fall.