Gentiana lutea aka Yellow Bitterwort

Gentiana lutea, also known as the great yellow gentian, is a large perennial herb that is native to the mountains of central and southern Europe. It can grow up to 3 feet tall when in flower and is typically found in calcareous alpine meadows, moist grasslands, and open pastures. The plant has lance-shaped to elliptic basal leaves with deep, ribbed veins and whorled clusters of yellow flowers on the axils of upper, clasping leaves that emerge in mid to late summer. The large taproot of this species, which can reach up to 3 feet long, has been historically used for medicinal purposes and as a bittering agent. Great Yellow Gentian is a rare houseplant that can be grown easily with regular watering and long-lasting, direct light less than 1 foot from a window. It prefers well-draining soil and does not require added fertilizers if repotted each time it doubles in size. This plant belongs to the Gentiana genus and is native to central and southern Europe.