👉 Nephasis is a type of flowering plant in the family Apiaceae, commonly known as the Japanese knotweed or the ground-leaved knotweed. It is native to Asia and parts of Europe and North America, where it grows on banks, roadsides, and in wetlands. Its leaves are usually arranged in a fan-like shape and have thin, delicate hairs that can be used for attracting pollinators like bees and butterflies.