Petasites japonicus aka Japanese Butterbur

Petasites japonicus, also known as butterbur, giant butterbur, great butterbur, and sweet-coltsfoot, is an herbaceous perennial plant in the family Asteraceae. It is native to China, Japan, Korea, and Sakhalin and has been introduced in Europe and North America. The Ainu people refer to the previous inhabitants of Ezo as the Korpokkur or "people who dwelt below ground," and they are popularly associated with fuki leaves in art and mythology. Occasionally, morphologically hermaphroditic (but functionally sterile) flowers exist. Bog Rhubarb, a super rare houseplant, is easy to grow and needs regular watering to thrive. It belongs to the Petasites genus and is native to Korea, China, and Japan. Bog Rhubarb does best in moderate sunlight and should be less than 6 feet from a window.