1、 Leaf difference
The leaves of drunken fish grass are opposite. The leaves are membranous. The leaves are oval or oval, about 3 to 11 cm long and about 1 to 5 cm wide. The top of the leaves is gradually sharp, and the base is wide wedge-shaped or round. The edge of the leaves has full edge or wavy tooth marks, dark green above and grayish yellow green below
The leaves of large leaf drunken fish grass are opposite. The leaves are membranous or thin paper. The leaves are narrow ovate, ovate lanceolate or narrow oval, about 1 to 20 cm long and 0.3 to 7.5 cm wide. The top of the leaves gradually becomes sharp
2、 Flower difference
The flowers of drunken fish grass are spike shaped cymes, about 4 to 40 cm long, about 2 to 4 cm wide, and the flowers are purple
Large leaf drunken fish grass has racemose or paniculate cymes, terminal, 4 to 30 cm long, and the Corolla is lavender, and finally turns yellow white to white