Asarum is similar to Asarum, but the rhizome is thin, 5 to 15 cm in length, 1 to 3 mm in diameter, and 0.2 to 1 cm in internodes. The leaves are thin and heart-shaped.
Fine sin is similar to Liao fine sin, but the roots are thin, 5 to 15 cm long, 1 to 3 mm in diameter, and 0.2 to 1 cm in length between sections. The leaves are thin and heart-shaped.