1、 Blade difference

The leaf of Acorus tatarinowii is grayish green, in a wide sword shape, about 40-60 cm long and 1.5-3 cm wide. The top is acuminate, the base is sheath shaped, the color is light, and the midvein is obvious. The leaves of Acorus calamus are green, sword shaped linear, much wider than the former, about 90-100 cm long and 1-2 cm wide, with a wide base and folded in half

2、 The difference between flowers

The color of yellow Acorus calamus flower is yellow, the outer perianth lobes are oval or obovate, with black stripes, about 7 cm long and 4.5-5 cm wide, and the inner perianth lobes are oblanceolate, smaller, about 2.7 cm. The flowering period is in May every year. The color of Acorus calamus flower is yellow green, the meat spike inflorescence is narrow conical cylindrical, and the perianth piece is much smaller than the former, about 2.5 mm. The flowering period is from June to September