This is Ipomoea alba, also known as Tropical White morning glory, moonflower, Giant White , and moon vine. This amazing tropical vine is very fragrant and quite beautiful. The flowers open quickly in the evening and stay open until they are touched by the morning sun. This plant must live in full sun and blooms from late Spring until early Winter. Ipomoea alba is the plant for bringing the Morning-glory Prominent, and Morning-glory Plume, and Morning-glory Leafminer Moths, and it also lures the Mexican Fritillary, and Spicebush Swallowtail butterflies into your garden. This plant is a larval host for the Morning Glory Pellicia, Mimic butterflies and the Pink-spotted hawkmoth. It is a nectar source for the Sheep Skipper, Purplish-black Skipper, and Cloudless Sulphur butterflies. The seeds and leaves can both be eaten and are best when picked while they are still young. They can be eaten as a vegetable or be used in soups, stews, and curries. The leaves can also be dried out and saved to use later. This Plant grows anywhere as an annual, and it is a tender perennial in USDA Hardiness Zones 8 to 11.