Evening primrose, also known as Chinese cabbage and white-backed notoginseng. Tomorrow grass and tomorrow grass are two completely different plants, and some pictures edited by Baidu Encyclopedia are wrong.

Evening primrose, compositae, is a perennial evergreen erect herb with a plant height of 30-80cm, straight root system, fleshy taproot and many lateral roots. The stems are erect, fleshy, purplish red, green at the base, light green at the tender stems, shallow at the edges, pubescent or hairless, and strong in branching. Leaves are solitary, alternate, fleshy, ovoid or ovoid, long 10 ~ 12 cm, wide 4 ~ 6 cm, with coarse serrations at the edges, green leaves, light green back and white dry film hairs on both sides. Head, fully flowering, golden yellow. Fruit achene, cylindrical, dark brown when mature, white crown hair. Suitable for harvesting tender stems and leaves for many times. Stems have a strong ability to form adventitious roots, and cuttings are easy to survive, only flowering but not fruiting.