1、 Leaves

Duheng's leaves are heart-shaped or kidney heart-shaped, with a length and width of 3-8 cm, blunt or round at the front end and heart-shaped at the base. The lobes on both sides are about 1-3 cm long and 1.5-3.5 cm wide. The leaf surface is dark green and the back is light green. There are white spots on both sides of the veins in the middle of the leaves, short hairs on the veins and nearby edges, and the length of the petiole is about 3-15 cm

Asarum leaves are usually only 2, and the leaves are heart-shaped or oval heart-shaped. The base is heart-shaped, and the top is relatively round with different sizes

2、 Flowers

Duheng flower duheng's flower is dark purple, the length of pedicel is between 1-2 cm, the perianth is tubular, 1-1.5 cm long, 8-10 mm in diameter, the throat is not constricted, the diameter of laryngeal pore is 4-6 mm, the membrane ring is very narrow, less than 1 mm wide, and the inner wall has obvious lattice mesh. Perianth equal, 4-5 mm long, without folds at perianth, nearly 4-5 mm long, and ovate

The flowers of Asarum are black purple, the pedicel is about two or three millimeters long, the perianth lobes are triangular ovate, and the flowering period is also from April to May