1、 Leaf difference

Nine headed grass is opposite to one leaf, clustered at the base, linear lanceolate or linear, 3-9 cm long and 1-4 cm wide. The base of the leaf holds the stem, the leaf is entire, both sides of the leaf have short villi, and there are more villi on the leaf edge

Nine lion grass leaves are oval, rectangular and round, 5 to 12 cm long and about 2.5 to 4 cm wide. The top of the leaves is gradually sharp, and the base is blunt or sharp

2、 Flower difference

The flower of nine headed grass is solitary in the leaf axil, the small flower stalk is 6 to 24 mm long, the calyx is tubular, green or purple, and there are 5 petals, which are white, light pink or light yellow, in strip shape

The inflorescences of nine headed Leonurus are terminal or axillary, composed of 2 to 8 cymes. The Corolla is pink or purplish, 2.5 to 3 cm long