This plant grows to 1–3 m tall, with weak arching stems often scrambling over other vegetation or rocks. The leaves are alternate, simple, 4–7 cm long, with a sharply serrated margin. The flowers are bright yellow, with five petals. The fruit is a dry single-seeded achene 5 mm long. This variety has single stalks with deep yellow flowers.
Kerria japonica, the sole species in the genus Kerria, is a deciduous shrub in the rose family Rosaceae, native to eastern Asia, in China, Japan and Korea. It is also found in the United States (AL, CT, IL, NC, NH, NJ, NY, OH, PA, RI, SC, TN, UT, VA) and Canada (ON). Seen in my yard.