1、 Plant differences:

The height of Xianfeng grass is about 90 cm. There are no fine hairs distributed up and down the stem. It is square in shape and has many branches

Bidens bipinnata is on the high side, about 30 to 100 cm high. There is particularly sparse pilose above the stem, which is in a quadrangular shape

2、 Different blades:

The leaves of Xianfeng grass are opposite, the leaves are small, about 3cm long, and the color is grayish green or dense green

Bidens bipinnata leaves are slightly larger than the previous ones, with a length of 2 to 4.5 cm and a width of 1.5 to 2.5 cm. The edges of the leaves are serrated

3、 Different flowers:

The stem of Xianfeng grass is about 3 to 6 cm long, with yellow tubular flowers in the middle and white tongue flowers next to it, with about 4 to 7 tongue flowers

Bidens bipinnata has a long pedicel, with a maximum length of 8.5cm. There are only yellow tubular flowers in the middle of the flowers, and there are no white tongue flowers next to them