Day lily is a type of plant with yellow or orange funnel-shaped flowers, each of which lives only a single day. The plant grows from thick, fleshy roots and produces narrow leaves about 2 feet (61 centimeters) long. The flowers grow in loose clusters at the top of a leafless stalk that may reach 5 feet (150 centimeters) in height. Six to twelve flowers make up a cluster, and two or three open each day. Day lilies are native to Asia and are popular garden plants. They grow under almost all conditions as long as the soil is not too wet and there is some sunlight. They rapidly grow into large clumps that may be divided in late summer or early fall.