1、 Morphological discrimination

Haijinsha is a perennial herb. Its height is about 1 to 5 meters. The plant is relatively high. The rhizome at the bottom grows horizontally, and the texture is relatively tough. There are many small fibrous roots distributed on the edge. The appearance color is dark brown, the color looks darker than that, and some small hairs are distributed on it

2、 Leaf discrimination

The number of leaves grows more, distributed on both sides of small short branches above the stem, which seems to be distributed symmetrically, and short hairs are sparsely distributed on the leaf axis. In summer, spikelets like tassels grow on the lower edge of the leaves. The spikes are about 2 to 5 mm long and have small warts on the surface