The leaves of duheng are heart-shaped or kidney heart-shaped, 3-8 cm in length and width, blunt or round at the front, heart-shaped at the base, 1-3 cm in length and 1.5-3.5 cm in width on both sides, dark green on the surface and light green on the back. There are white spots on both sides of the veins in the middle of the leaves, short hairs on the veins and near edges of the leaves, and petiole length is about 3-15 cm.
Asarum leaves are usually only 2, the leaves are heart-shaped or oval heart-shaped, the base is heart-shaped, the top is relatively round, the size is different.
Duheng flower the flower of duheng is dark purple, the length of the pedicel is between 1-2cm, the perianth is cylindrical, 1-1.5cm long, 8-10mm in diameter, the throat is not constricted, the throat hole diameter is 4-6mm, the membrane ring is very narrow, less than 1mm wide, and the inner wall has obvious lattice mesh. Perianth lobes erect, ovate, 5-7 mm long, nearly equal in width and length, smooth without folds, flowering from April to may
Asarum flower is black purple, pedicel about two or three millimeters long, perianth lobes triangular ovate, flowering also in April May
