The leaf color of Acorus tatarinowii is dark green, linear, about 20-50 cm long, folded in half from the base, and unfolded above the middle. The color of Acorus calamus is light, green, sword shaped, long, about 90-150 cm,
Acorus tatarinowii is a triangular inflorescence, about 4-15 cm long. Its fleshy inflorescence is cylindrical, and its upper part is upright or slightly curved, gradually pointed, and its flower color is white. But the water calamus inflorescence is a little bit flat, the flesh spike inflorescence is nearly erect or inclined upward, it is narrow cone-shaped cylindrical, the color of the flower is yellow green.
The root of Acorus tatarinowii is oblate, about 3-20cm long and 0.3-1cm in diameter. The color of its surface is dark, grayish brown or tan. And the root of Acorus calamus is thicker than the former, with a diameter of about 1-1.5cm, less branches, slightly lighter color, and the lightest to white.
