Butter Cup, Cup of gold. Striking vine with glossy leaves and large showy white to yellow flowers.The flowers are truly spectacular, shaped like a chalice, 6-10" long, flaring open to 4-7" across. The five lobes of the corolla are reflexed, and each lobe is marked with a narrow purplish brown ridge on the inside. The flowers start out yellow and turn deeper golden as they age. They are fragrant, especially at night, with a scent reminiscent of coconut. Cup of gold blooms intermittently through the year, but mainly in the winter dry season.