A herb. It keeps growing from year to year. The stems arch over. It grows about 50-90 cm high. It spreads 30-40 cm wide. It has a creeping rhizome. The stems are upright with angular forks. There are only a few leaves. There are 1-4 flowers and they hang down. The flowers are pale yellow. The flowers are bell shaped. They are 3-5 cm long.